[danny zubot]

There are many good points made above, thanks to everyone.

I have considered getting Tunze's with controllers or some other type of wave maker. I like the idea of being able to move them where ever they need to be in the tank. Closed loops offer some very cool options for wavemakers though.

I guess I'm just trying to figure out what is best for the tank right now. Do I rip it down and drill the tank full of holes or do I spring for the tunze's and be done with it? Do I risk damaging the balance my tank is starting to find? I'm not sure, but that is why I need peoples opinions. With the exception of some hair algae the tank is finally starting to thrive again after moving a few months ago.

LSM your numbers from the calculator seem a little more realistic to me. I've heard that sequence pumps are quite reasonable in the efficiency so if I go the closed loop direction I'll most likley buy one.

Does anyone run a closed loop with SQWD's? How are they? I can't seem to justify spending OM 4 prices for a 65 gallon tank.

Can anyone suggest a reasonable Tunze setup for a 65 gallon tank? Nano's or streams etc?