I am in the process of designing my first aquapoincs system. Right now the plan is to have a constant height in the fish tank, pump in the sump, media based system. The fish tank is a 300 gallon cube (what are those called?), and the two grow beds will be made of wood with an EPDM liner.
I am planning on flooding the grow beds by using a larger pump on a timer (Laguna Maxflo 4200 - I got it for free, so I am going to try it. Max flow rate is 70 gpm, but it is only a 160 watt pump), and having a restricted drain. What is the best way to build a restricted drain?
I was planning on putting a 4" PVC pipe with lots of holes in it to keep the media away from the 2" PVC drain, which will have only a few holes in it.
Also, is there a certain type of PVC glue I should be shopping for? Is UV resistant PVC resistant enough to leave exposed to sunlight, or should I cover it with something?
Lastly, are bulkhead fittings the recomended fittings to form a water tight seal on the cube and against the EPDM?
http://ep.yimg.com/ca/I/77hydro-store_2090_27148560"/>good luck on your system