I run Hydor rotating heads on my powerheads. They work awesome. I have 1200GPH going in my 30g tank. 35x turnover +/-
I am running about 7000GPH through my 240g tank. Wanting to build a surge box out of a 20g tank. It would only surge about 10g--12g because I am going to use a toilet flapper instead of drilling the bottom of the tank. The logistics of building a shelf to hold a 180lb tank 6 feet in the air--not my strong point.
