turnover

Needing to get a HOB overflow for my dads tank to make it into a sump his tank is 46 gallons and the sump will probably add 10 so let's say about 55Gallons my question is, is a 300gph Overflow going to be enough or do I need more the only other one I can find is a 800 GPH which I think is to...

Im wondering which return pump i get. I am building a 40g. With the sump minus sand and rocks i should be at +- 60g. It will be pumping up about 3 1/2' - 4' head. What should turnover w/o power heads be. Ive heard 4times on the low end and 10 on the triton method. What are you all running?

Hello all im wondering how much flow everyone is running to their sump and if you have a refugium or not. I'm trying to plan a 90 with a fuge so I'm looking for any and all input. My 44 runs 5x per hour but i have been told that's too low as well as just right for my fuge. I compensate for flow...