I am looking at this tutorial: https://www.instructables.com/id/Simple-Arduino-Controlled-Aquaponic-System/
Felix, Helen Marko and I are going to work on it the aquaponic farm.
BOM from the tutorial:
Full BOM
Principal Components
Pump
Grow bed
Fish tank
Sump tank
Stand
Bell Siphon
25mm polypropolene tank fitting
1 off. 25mm female threaded fitting
1 off. short length* ~100mm length of pvc pipe. note that this length is critical in determining the top level of the water during the flood cycle.
1 length off 50mm PvC pipe
1 off. 50mm Pvc endcap
Media Filter
90mm PVC pipe
90mm end cap
Outlet Pipe
1 off. 25mm male threaded fitting
1 off. 25mm 90 deg elbows
2 off. short lengths of 25mm pvc pipe to join fittings
2 off. 25mm 90 deg elbows
1 off. 25mm ‘T’ fitting
1 off. 25mm female threaded adapter
2 off. 25mm threaded male to 19mm barbed hose fitting (poly propylene)
2 off. 25mm end caps
2 off. 25mm pvc pipe cut to 200mm (depends on width of your grow bed)
various short lengths of 25mm pvc pipe to join fittings
Overflow Pipe
1 off. 50mm polypropolene tank fitting
1 off. 50mm female threaded adapter
Chicken wire
Electronics
Arduino
ATX power supply
Relay Kit
Enclosure