I've just had one built for me by my son for a 12 x 6 foot fishroom. I have 13 fish tanks with 2 outlets each and am currently running a Clear Seal LP20 on it. I did put another pump on the circuit, a Blagdon Koi Air 30 but turned it off for now as there is enough pressure with just the one.
I'm running airstones and sponge filters with it and am so far very pleased, wish i'd done it years ago :woohoo: