Thebigcorycat
Aquarium Advice Apprentice
- Joined
- Mar 9, 2014
- Messages
- 15
I have a 20 gallon tank with about 10 small fish in it (3 danios, 4 skirts, 3 small cory cats). All the fish seem healthy and water tests are all good. I have a Marineland penguin 150 with the bio wheel filter. My wife wants to add like 3 more fish (little tetras), but I'm worried it'll start to overload the water balance. If I got a "better" filter like a Fluval c3, could I safely add a few more fish? I would transfer old filter material to the new filter or run the filters together for awhile. Any thoughts?