Just a wild and maybe a stupid question, but have you been doing regular water changes or just topping off the tank? I ask this since you stated you just did a 50% change because "the filter was nasty". I read this as if that is the indicator for needing a water change.
What are your water parameters? pH, ammonia, nitrIte, nitrAte? Do you have test kits to sample the water? What kind of filtration?
This info will help us, help you! :clap:
What are your water parameters? pH, ammonia, nitrIte, nitrAte? Do you have test kits to sample the water? What kind of filtration?
This info will help us, help you! :clap: