The Planted Tank Forum banner
1 - 1 of 1 Posts

1,945 Posts
Overstocked Tank?

Hello cold...

The question isn't really important, because you already have the fish. A 20 gallon tank is small no matter what's in there. You can have the best filtration system available, but it doesn't have the ability to remove the old, dirty water and replace it with new. It's just taking in toxic water and returning the water a bit less toxic.

The best thing you can do is work toward a more aggressive water change routine. Get to the point you're changing out half the water every few days. The water change is the true filter, not the mechanical thing attached to the tank.

Consider a larger tank. Your fish will appreciate it.

1 - 1 of 1 Posts