So I have a small 10-gallon tank, that's planted, with two small common goldfish temporarily before I move them to my other 50 Gallon tank.
Anyways, I just got it a week ago, I currently have a filter rated for 30 gallons running. It is an Aqueon QuietFlow 20. The filter has an "LED
" indicator when it is time to replace the filter and it was on after about 4-5 days. I checked the filter itself and saw that it was caked with this brown paste on both ends of the filter pad.
I assumed that maybe it was because I was overfeeding the fish, But I'm not sure. Any of ya'll experience the same thing?