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2. Methods

(a) Equipment list:
  • Storage Box x2
  • LEDLights (purple) <- See how
  • Solar Panels
  • Wire Tray
  • Supporting boards
  • BacterLife by Waterlife
  • Nitrate ion-selective electrode
  • Nitrate ion-selective electrode NO3-BTA
  • Carbon Dioxide Sensor
  • Ammonium ion-selective electrode NH4-BTA
  • Dissolved Oxygen Sensor
  • Air Pump
  • Pipes and tubes
  • Styrofoam
  • Net baskets
  • Fishes
  • Fish Food
  • Bacteria
  • Container
  • Filter (to contain bacteria)
  • Bell Siphon
    • 1 - 3" PVC pipe
    • 1- ¾” Uniseal Fitting
Bell Dome
  • 1 - 2" PVC pipe
  • 1 - 2" PVC cap
Bell Siphon
  • 1 - 3/4" PVC pipe
  • 1 - 3/4" to 1 1/2" bell adapter
Grow Bed Connections
  • 1 - 3/4" Male adapter (thread to slip)
  • 1 - 3/4" Female adapter (thread to slip)
  • 2 - #18 o-rings
Drain Pipe
  • 2 - 3/4" PVC pipe 4 inch long
  • 1- 3/4" 90o elbow
  • 1 - ¾” 45o elbow

( (b) Diagrams
Sketchup Drawn by: Valerie and Jia Hui















(c) Procedures for building:
  1. General Building:
    1. Set up the antonius wire tray
    2. Remove two baskets
    3. Place storage boxes from daiso in (it should fit)

  1. Upper Section:
    1. Styrofoam and Vegetations
      1. Get a styrofoam
      2. Drill 6 circular holes in a styrofoam
      3. Put Vegetation in the holes and make sure they fit just nicely
      4. *optional* Add net baskets to easily remove the vegetation.
    2. Waterbody
      1. Pour clean freshwater into the box
      2. (Optional) Add Necessary Nutrients
      3. Place a S-Hook at the side of the Antonius Wire Tray, and put a plastic bag over the hook.
      4. Dump your ph-metre tester and nitrate level tester inside the plastic bag
      5. Drill/ Cut a hole big enough for air pipe to fit at the bottom of the highest storage box.
      6. Put a pipe through that hole

  1. Lower Section
    1. Add a Storage Box
    2. Place wire nettings /gazzete(?) over the top of the box but leaving a circular hole somewhere towards the right side.
    3. Connect a tube from the hole of the top storage box to the pump of the lower storage box.
    4. Fill the lower storage box with water.
    5. Add fishes inside.
    6. Take a small plastic waterproof box and place inside the fish tank and at the end of step 14.
    7. Cut a hole the size of the connected Air pipe
  2. Solar Panels
    1. Get the solar panels and connect it to the battery and the light
  3. Bell Siphon


(d) Procedures for testing:
  1. Let the ammonia produced by the fish accumulate near the bacteria
  2. The bacteria will work on its own and convert the ammonia to nutrients for the plant to absorb
  3. The nutrients in the water will be pumped up into the tank where the plants are
  4. The plants will be given time (maybe 15-30mins? not confirmed) to absorb the nutrients and provide oxygen
  5. The oxygen produced in the water will be pumped back down to the fish tank
  6. The fish get to enjoy the fresh supply of water
  7. Repeat procedures 1-6
  8. Meanwhile, during the day, the solar panels will be placed aside separately to absorb oxygen for later while the prototype will be also placed under the sun so the plants can also provide oxygen without the solar panels in the day.
  9. At night, the solar panels will be used to replace the sunlight in the day.for the vegetables (lettuce)

(e) Risk, Assessment and Management:

Risk
Assessment
Management
Breathing in the smelly smell of fish waste (ammonia)
Medium
Students try to avoid breathing in when handling with their waste
Students may need to breed bacteria which may/may not harm them
Medium
Make sure that they are wearing gloves or thongs.
There may be a risk of accidentally cutting a finger when drilling a hole in the wood/ styrofoam.
Medium
Ask teacher for help or be extremely careful
There may be a chance to be bitten by the fish
Low
Try to be extra careful


(f) Data Analysis
To test out our system if it works, we will do the following procedures:

  • Build our Aquaponics system
  • Test out whether our Bell Siphon works by recording a video (1) 
  • Test out whether our water pump works by recording a video (2)
  • Record a video when we introduce our Tilapias into the system to measure their growth (3)
  • Record a video when we introduce Butterhead Lettuces into the system weekly to measure the growth (4)

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