Originally Posted by Fishpunk
It depends a lot on what you plan to keep in the tank and how sensitive to current. lohachata's 900 gallons per hour is a quarter gallon every second. That's a LOT of current to put into a tank That's like emptying a gallon milk container into the tank in 4 seconds, and I guarantee you can't dump it out the top of the container that fast.
Many fish can't handle that kind of current.
I agree. Depends on what you'll have in there, not just with current but bioload too. Filling a 90g with neon tetras would need a lot less filtration than putting oscars in there, for instance.
100 gallon - 4 orandas, 1 comet, 1 black moor, 1 ryukin, 1 ranchu/lionhead/lionchu/something, 2 veiltail goldfish
40 gallon - goldfish fry
55 gallon - demasoni mamas and fry
46 gallon - angelfish and assorted others, planted
40 gallon - hospital/QT
10 gallon - halfmoon betta and ADFs
5 gallon - halfmoon betta
Change the water!!! LOTS OF IT!!!