New to fbt..set up ?

[amber1003]

I am taking care of my nephews fbt's, his mom wont let him keep them. We just got this setup and plan on doing more with it but have would like suggestions, we want to keep i simple and easy to clean, right now we do have a filter but water is cloudy after 2 days, any suggestions would be helpful. It is a 10 gallon with 2 fbt's

Im thinking the small rocks r holding the debris but not sure



Thanks a bunch