Yes Madduff ,That was my thought. I am not here to re-invent the wheel though

Martin is correct about the power head and head pressure and it would not flow as much at the entry to the tank.I should have thought of that. But a large pump and pre filter could be used with a full width spray rail low on the tank also or a couple of diffusers. I see more clearly now as my original concern was over a 7' tank . I am going to do a couple of 20 breeders I have instead which will be better suited to the smaller hilli's.I added two Fluval4plus to simulate this for now in each of my larger tanks. I am very curious about this and have several sponges on hand.I will be watching your progress on this MadDuff
