how many sponge filters will i need for a 224L tank?

[whitesandals]

what the title says lol...its for a discus breeding tank

[Zayne]

what types are you talking about? the ones that attach to the side, or the ones that sit on the bottom

[Mirio]

Just making sure, but i don't think you would need such a large tank to breed discus.

maybe a smaller tank around 60-100 liters which will require only 1 sponge filter but water changes is the important key. Also make cleaning the tank slightly easier too, as if you're using a tall tank i imagine it'd be horrendous,A tall tank of that capacity especially.

[ally07]

I agree with Ethanyo, it's not so much how many sponge filters but how much water change. I've read somewhere before that fish fry actually release a chemical or substance into the water which is a growth inhibitor. By slowing down the growth of its siblings, each fry stands a higher chance of getting bigger and surviving better (theoretically). Apparently, daily water changes are the only way to counter this (10-25%), but your hard work will be paid off with bigger, faster growing fry which will ultimately be healthier. The more water changes you are prepared to do, the less sponge filters you'll need in the tank. But if it's a only fry tank my estimation is that two would suffice, with lots of water changes.

[ryanjury]

A couple of big ones with good air pressure would do the trick.. However I agree with the others water changes are the key most people who are serious about their discus probably don't need filters as they do like 50-90% water changes every day or 2.