This is a Self-Learning Module (SLM) for Technology and Livelihood Education (TLE) Aquaculture, Grade 7/8 Exploratory Course, Quarter 1, Module 5: Draw and Layout Tanks. It was made for learners studying at home, and it covers the knowledge and skills needed to draw a layout plan for fish tanks. By the end, learners should be able to name the kinds of tanks used in aquaculture, the life support systems that keep them running, and draw basic tank layouts.
On this page 7 sections
What learners will learn
After going through this module, learners are expected to:
- identify different kinds of tanks;
- identify different life support systems for tanks;
- draw the layout of different tank designs according to established standard procedures.
Lesson in this module
The module has one lesson, Lesson 3: Draw Lay-out Plans for Tanks. It begins with a review of the previous lesson on pond compartments and pond layout plans. It then shows tanks as another way of building aquaculture facilities that may suit your locality better.
Key ideas: tanks and their designs
The module defines a tank as a large container of liquid, rectangular, square, or circular in shape, usually used for culturing fish.
Hatchery tanks
A hatchery is a place where fish eggs, larvae, or fry are produced under artificial conditions. They are later released to their natural habitat or raised for human consumption. The hatchery is the first phase of fish production. Next comes the nursery phase in nursery tanks. Last is the grow-out phase, where fish are raised to marketable size in ponds, pens, tanks, or cages.
Hatchery tanks should be easy to operate and free from work hazards. The layout should leave room for future tanks and for water and air supply systems.
The module’s basic layout for a small-scale hatchery has:
- Indoor section: 2 larval or fry tanks, 1 sand filter, and 3 rotifer tanks
- Outdoor section: a pump house and 3 microalgae tanks
The types of tanks in a small-scale hatchery, about 1 meter deep, are:
- Sand filter tank: water passes through layers of filter media and out the bottom. The module’s diagram shows sand on top, gravel in the middle, and large stones at the bottom.
- Larval rearing tank: about 6 cubic meters in capacity, built so it can be drained quickly and completely.
- Live food production tanks: used to grow microalgae, usually placed outside the hatchery tanks.
- Small fiberglass tank: 1 to 2 cubic meters, used for rotifer enrichment.
Grow-out tanks
Tanks for culturing fish can be made of concrete. They can be rectangular, square, hexagonal, octagonal, or circular. Grow-out tanks are typically 4 to 10 meters in diameter and 1 to 3 meters deep.
- Rectangular concrete tanks: the drain hole, fitted with a 3-inch PVC pipe, is at the rear end of the tank. The floor slopes 5 to 15 degrees toward the drain hole for easy draining, cleaning, and maintenance. An outlet hole drains water into a drainage canal that leads away from the tank site.
- Circular or hexagonal tanks: the outlet is placed in the middle of the tank. The bottom slopes slightly toward the center.
| Hatchery tanks | Grow-out tanks |
|---|---|
| Sand filter tank | Rectangular or square |
| Larval rearing tank | Circular |
| Live food production tank | Hexagonal or octagonal |
Key ideas: life support units
Sea water supply system
- Intake structure: pulls water from the sea using a 746-watt (1 hp) electric motor.
- Filtration unit: removes suspended solids such as fine silt, debris, and foreign organisms.
- Water pump: made of cast iron, stainless steel, fiberglass, or plastic to prevent corrosion. It should be self-priming.
- Water pump reservoir: holds a ready supply of water.
Fresh water supply system
- Standby water pump and accessories: draws water from a well or other source when the natural water supply is a problem.
- Air supply system: a blower supplies a high volume of air at low pressure. At least one 1 to 2 hp blower is needed, although two units are better.
How to use this module
- Start with What I Know. Answer the 10-item pretest to check what you already know.
- Work through the parts in order: What’s In (review questions), What’s New, What is It (the discussion), then the activities.
- Activities: classify tanks into two categories (What’s More). Make a diorama of a small-scale hatchery layout on a half-size illustration board or chipboard (What I Have Learned). Make a brochure of tank life support units with pictures and descriptions (What I Can Do).
- Assessment: identify and label pictures of tanks and equipment, then explain why life support units matter in fish culture.
- Additional activity: design the basic small-scale hatchery layout described above.
For learners: write your answers on a separate sheet, not on the module. Use the answer key honestly to check your work.
For parents: help your child gather materials for the diorama and brochure, such as board, cut-outs, or print-outs.
For teachers: the answer key covers the pretest, What’s More, and the assessment. The diorama, brochure, and essay answers need your own checking.
Frequently asked questions
What grade and quarter is this module for?
The module is labeled TLE Aquaculture Grade 7/8 (Exploratory Course), Quarter 1, Module 5. It contains Lesson 3: Draw Lay-out Plans for Tanks.
Does the module have an answer key?
Yes. It has answers for the pretest, the What’s More classification, and the assessment. The diorama, brochure, and short explanation are checked by the teacher.
What are the types of tanks in a small-scale hatchery?
The module lists the sand filter tank, the larval rearing tank (about 6 cubic meters), live food production tanks for microalgae, and small fiberglass tanks (1 to 2 cubic meters) for rotifer enrichment.
What are life support units for fish tanks?
They are the systems that supply water and air to the tanks. These include the intake structure, filtration unit, water pump, water pump reservoir, standby water pump, and blower for air supply.
Why does a tank floor need to slope?
A slight slope toward the drain makes draining, cleaning, and maintenance easier. In rectangular tanks the slope is 5 to 15 degrees toward the rear drain hole. In circular tanks it slopes toward the center outlet.
Full text of the module
The text below is a transcription of the PDF above, as printed.
Technology and Livelihood Education AQUACULTURE Quarter 1 – Module 5: Draw and Layout Tanks (Exploratory Course)
[illustration: students and a teacher reading, studying, and writing under a tree and in a classroom, with a globe and a lamp]
Copyright and Development Team
TLE Aquaculture – Grade 7/8 (Exploratory Course) Alternative Delivery Mode Quarter 1 – Module 5: Draw and Layout Tanks First Edition, 2020
Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines. However, prior approval of the government agency or office wherein the work is created shall be necessary for exploitation of such work for profit. Such agency or office may, among other things, impose as a condition the payment of royalties.
Borrowed materials (i.e., songs, stories, poems, pictures, photos, brand names, trademarks, etc.) included in this module are owned by their respective copyright holders. Every effort has been exerted to locate and seek permission to use these materials from their respective copyright owners. The publisher and authors do not represent nor claim ownership over them.
Published by the Department of Education Secretary: Leonor Magtolis Briones Undersecretary: Diosdado M. San Antonio
Development Team of the Module
Writer: EDERLEAH MARIE S. NOVIO Editor: PINKY G. TANAP Reviewers: MARIO DONIO, EDWARD RYAN F. GULAM Illustrator: ASCER P. ABELLON JR. Layout Artists: GERALD V. LAUGLAUG, MAYLENE F. GRIGANA, MARJORIE P. GABUMPA Management Team: ALLAN G. FARNAZO, GILBERT BARRERA, ARTURO TINGSON, JR., PETER VAN ANG-UG, DONNA S. PANES, ELIZABETH G. TORRES, JUDITH B. ALBA
Printed in the Philippines by Department of Education – SOCCSKSARGEN Region
Office Address: Regional Center, Brgy. Carpenter Hill, City of Koronadal Telefax: (083) 2288825/ (083) 2281893 E-mail Address: region12@deped.gov.ph
Technology and Livelihood Education AQUACULTURE Quarter 1 – Module 5: Draw and Layout Tanks (Exploratory Course)
[transcriber’s note: this page repeats the cover title block; its text is the same as page 1]
Introductory Message
This Self-Learning Module (SLM) is prepared so that you, our dear learners, can continue your studies and learn while at home. Activities, questions, directions, exercises, and discussions are carefully stated for you to understand each lesson.
Each SLM is composed of different parts. Each part shall guide you step-by-step as you discover and understand the lesson prepared for you.
Pre-tests are provided to measure your prior knowledge on lessons in each SLM. This will tell you if you need to proceed on completing this module or if you need to ask your facilitator or your teacher’s assistance for better understanding of the lesson. At the end of each module, you need to answer the post-test to self-check your learning. Answer keys are provided for each activity and test. We trust that you will be honest in using these.
In addition to the material in the main text, Notes to the Teacher are also provided to our facilitators and parents for strategies and reminders on how they can best help you on your home-based learning.
Please use this module with care. Do not put unnecessary marks on any part of this SLM. Use a separate sheet of paper in answering the exercises and tests. And read the instructions carefully before performing each task.
If you have any questions in using this SLM or any difficulty in answering the tasks in this module, do not hesitate to consult your teacher or facilitator.
Thank you.
What I Need to Know
This module covers the knowledge, skills and aptitude required in drawing a lay-out plan for tanks.
After going through this module, you are expected to:
- identify different kinds of tanks;
- identify different life support systems for tanks;
- draw lay-out of different tank designs according to established standard procedures.
What I Know
Let us know how much you have learned with your previous module. Please answer the following.
Choose and encircle the letter of the correct answer.
How to remedy a tank with low dissolved oxygen?
a. Start the blower
b. Start the water pump
c. Start the paddle wheel
d. Start the electric fan beside the tank_____ are small aquatic organisms raised in tanks which are commonly used as the first food of young fin fishes?
a. Larvae
b. Phytoplanktons
c. Rotifers
d. MicroalgaeWhat is the term used to indicate a large container of liquid usually used in culturing fish?
a. reservoir
b. tank
c. basin
d. fishpondWhy is it necessary to design the tanks in the hatchery?
a. To have a beautiful tanks
b. To create a beautiful arrangement of tanks.
c. To have a uniform size and shape of tanks
d. To conform with the characteristics of the target specie of fishWhat is the first phase of a fish production system?
a. construction of aquaculture facilities
b. hatchery
c. nursery
d. grow-outSeparating suspended solids from water such as silts, debris and foreign organisms can be done by the use of _____.
a. fine mesh screen
b. secchi disk
c. filtration units
d. intake structureEarly stage of the fish life cycle?
a. egg
b. fingerling
c. larvae or fry
d. post fingerlingThe sand filter tank is set up with how many layers of different filter media?
a. 2
b. 4
c. 5
d. 3In a milkfish broodstock tank, what is the design?
a. Triangular
b. Rectangular
c. Square
d. circularWhere are newly hatched fish eggs placed?
a. Hatchery tank
b. Broodstock tank
c. Nursery tank
d. Grow -out tank
Lesson 3: Draw Lay-out Plans for Tanks
What’s In
Let’s try to recall your previous lesson. Answer the following questions:
- What are the different compartments of a pond?
- To draw a lay-out plan for ponds, what is the basic procedure to be done in order to represent the actual measurement of the said layout?
- What are the following fishpond facilities that control the water of the pond system?
What’s New
If you plan to invest or venture into fish farming, what is one of the things that you must consider?
Maybe you think of the relation of the natural resources and its location where you reside.
In this lesson, you will be directed into another way of developing aquaculture facilities which may be best fit to your locality.
What is It
Fish Tank Layout and Design
Tank is a large container of liquids, rectangular, square or circular in shape usually used in culturing fish.
HATCHERY TANK DESIGN
Hatchery is a place where fish eggs, larvae, and /or fish fry are produced under artificial conditions for later release to its natural habitat or for human consumption. In terms of production, this is where the first phase takes place. Followed by nursery to be placed on nursery tank and finally, to grow-out phase to be cultured in ponds, pens, tanks or cages where fishes are grown to marketable size.
The hatchery tanks should be made to provide easy operation and free from work hazards. The design and layout should have room for further expansion with enough space left for the future tank construction, water and air supply system, etc.
[photo: rectangular tank, indoor hatchery with a pipe supplying water]
Fig. 1 Rectangular tank
Source: Image from the journeytothephilippines.wordpress.com
[chart: diagram; Figure 2 Basic layout for a small-scale hatchery]
Labels printed in the diagram:
- Indoor section: Larval / Fry tank; Sand filter; Larval / Fry tank; Rotifer tanks (three unlabeled boxes below)
- Outdoor section: Pump (label above the pump house); three unlabeled tank boxes
Figure 2 Basic layout for a small- scale hatchery with 2 larval tanks, 1 sand filter, 3 rotifer tanks in the indoor section, a pump house and 3 microalgae tanks in the outdoor section.
Source: CBLM, Fish Culture NC II, 3rd Year, Module II. Pages 11-19.
Type of tanks in small- scale hatchery with 1 meter deep are:
Sand filter tank – composed of layers of different filter media. Water passes through a filter medium, commonly sand and out to the bottom of the tank.
[chart: diagram; Figure 3 Sand filter tank. Labels: “Seawater intake” (arrow into top), “Sand” (top layer), “Gravel” (middle layer), “Large stones” (bottom layer), “Seawater outlet” (arrow out from bottom)]
Figure 3 Sand filter tank Source: CBLM, Fish Culture NC II, 3rd Year, Module II. Pages 11-19.
Larval rearing tank – about 6 m³ capacity. It must be devised for rapid and complete draining.
[photo: larval rearing tank with white material and water]
Figure 4 Larval Rearing Tank Source: Dynamic Team Aqua Ventures Inc. Malapatan, Glan, Sarangani Province
Live food production tanks. These are used for microalgae production and are usually located outside hatchery tanks .
Small fiber-glass tank (1 to 2 m³ capacity), for rotifer enrichment
[photo: live food production tank with mesh-covered channels]
Figure 6. Live food production tank Source: Image from www.fao.org
[photo: small fiber-glass tanks beside pump equipment]
Figure 6. Small fiber-glass tank Source: Image from www.aquatrain.org
[transcriber’s note: the printed page has no Figure 5; both pictures on this page are captioned “Figure 6” as printed. The caption under the first picture is partly hidden by the image and is transcribed from the visible text.]
Designing Tanks for Culturing Fish
Tanks can be designed in various ways. These can be made of concrete in rectangular or square, hexagonal or octagonal or may be a circular one. Tanks for grow out are typically 4-10 m in diameter, and 1-3 m deep.
[photo: rectangular concrete tanks under a roof]
[photo: drain hole in a concrete floor]
Figure 7 Rectangular Tanks Figure 8 Drain Hole Source: CBLM, Fish Culture NC II, 3rd Year, Module II. Pages 11-19.
[photo: outlet hole with pipe in a tank wall]
[photo: drainage canal beside a tank]
Figure 9 Outlet Hole Figure 10 Drainage Canal Source: CBLM, Fish Culture NC II, 3rd Year, Module II. Pages 11-19.
The concrete rectangular tank drain hole fitted with 3 inches PVC pipe is located at the rear end of the tank (figure 7). The tank floor should have a slight slope towards the drain hole which is 5 degrees to 15 degrees for easy draining, cleaning and for maintaining purposes. While the outlet hole (figure 9) is used for draining water from the tank through the drainage canal (figure 10) that passes out from the tank site.
[photo: circular fish tanks indoors]
[photo: circular fish tanks with pipes overhead]
Figure 11. The circular fish tanks Source: Dynamic Team Aqua Ventures Inc. Malapatan, Glan, Sarangani Province
[chart: cross-section diagram; Figure 12. The cross section of a circular or hexagonal fishtank. Labels: “inlet”, “outlet standpipe”, “top & bottom stiffener angles”, “water level”, “glass coated steel wall sections”, “sloping concrete floor”, “central drain”, “soil”. Note printed: “NOT TO SCALE”]
Figure 12. The cross section of a circular or hexagonal fishtank Source: CBLM, Fish Culture NC II, 3rd Year, Module II. Pages 11-19.
The outlet must be placed in the middle of the tank. The tank bottom should have a slight slope towards the center where the outlet is built.
Life Support Units
A. Sea water supply systems includes:
Intake structure – used to pull water from the sea using electric motor with 746 watts and 1 hp
Filtration unit – used to separate suspended solids from the water, e.g .fine silts, debris and foreign organisms
Water pump – made of cast iron, stainless steels, fiber glass or plastic to prevent corrosion. It should be self- priming.
Water pump reservoir –holds a ready source of water in any case thereof.
B. Fresh water supply system
Standby water pump and accessories to be used in drawing water from a well or other sources in case natural water supply is a problem; and
Air supply system. Blower is essential to supply high volume of air at low pressure in the hatchery. At least one blower with 1-2 hp capacity is needed although 2 units are better.
[photo: water pump with blue hose]
[photo: blower motor]
[photo: tanks with aerators]
Figure 13 Water Pump Figure 14 Blower Figure 15 Tanks with Aerators
What’s More
Classify the types of tanks.
[chart: graphic organizer, empty; two boxes labeled “Category 1 & Examples” and “Category 2 & Examples”, each with a blank space below]
What I Have Learned
Instructions: In a half size illustration board or chipboard make a diorama of a lay-out in a small-scale hatchery tank.
What I Can Do
Instructions: Make a brochure of different tank life support units. Use a cut-out or a print-out of pictures of each with a clear description of it.
Assessment
Identify each picture and classify accordingly.
A.
[photo: indoor rectangular concrete tanks] [photo: circular fish tanks with black walls]
- _____ 2. _____
B. Label each picture accordingly.
[photo: tanks covered with netting] _____
[photo: yellow water pump with blue hose] _____
[photo: larval tank with white material] _____
C. Explain briefly. Why are tank life support units important in culturing fish?
Additional Activities
Design a basic layout for a small- scale hatchery with 2 larval tanks, 1 sand filter, 3 rotifer tanks in the indoor section, a pump house and 3 microalgae tanks at the outdoor section.
Answer Key
[transcriber’s note: this page is printed upside down; the text below is transcribed in upright reading order]
What I Know
A C A D B C C D D C
What’s More
| Hatchery Tanks | Grow-Out Tanks |
|---|---|
| Sand filter tank | Rectangular/square |
| Larval-rearing tank | circular |
| Live food production tank | hexagonal/octagonal |
What I Have Learned
Check the output of the students.
What I Can Do
Check the output of the students.
Assessment
- Rectangular tank
- Circular tank
- Live food production tank
- water pump
- larval rearing tank
C. Answers may vary.
References
Castanos M.T. SEAFDEC Asian Aquaculture
info@aquacare.com
Patadjai R.S. Article from SEAFDEC Asian Aquaculture
Sim S.Y., Rimmer M.A., Toledo J.D., Sugama, S., Rumengan I., Williams, K.C.. Philips, M.J. 2005. A Guide to Small-Scale Marine Finfish Hatchery Technology
Toledo C.F. Breeding and Hatchery Management
CBLM, Fish Culture NC II, 3rd Year, Module II. Pages 11-19.
http://www.fao.org
For inquiries or feedback, please write or call:
Department of Education – Bureau of Learning Resources (DepEd-BLR)
Ground Floor, Bonifacio Bldg., DepEd Complex Meralco Avenue, Pasig City, Philippines 1600
Telefax: (632) 8634-1072; 8634-1054; 8631-4985
Email Address: blr.lrqad@deped.gov.ph * blr.lrpd@deped.gov.ph
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