Planted Tank Guru
Join Date: Jun 2010
Location: philadelphia, pa
I have a factory drilled aqueon 125. so it has two overflows, but I really only use one piece of pvc as the drain, with another as the emergency. both of those in an overflow. the other side is used for the return to the tank, both of the drilled holes.
incredibly I don't have any recent pictures of the setup, but can take some this evening.
the single PVC drain drains plenty fast b/c it's at a full siphon; hence why it is silent (no air). a full siphon is many hundreds of gallons per hour, into the thousands even. so it's held back w/ a ball valve.
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