Hi all,
I recently purchased the Aquarium Co-op Coarse Sponge Filter for my 10 gallon single Betta aquarium. I also got the USB nano air pump, check valve, airline tubing, airline holders, and the air stone from here as well. I installed the new filter system into my well cycled aquarium on Sep 17 with the old filter still in there for a few days. After a few days I took my old filter out, and over the past three weeks, I've been having terrible algae problems. I've had to water change every few days to keep a carpet of algae from forming. My fish is suffering from fin rot, so I had taken out any plants because the aquarium salt could potentially hurt them, so the algae isn't coming from any plants. A carpet of algae is growing all over the sponge stopping it from filtering at all. Does anyone have any suggestions? I really really wanted to like this sponge filter, and am hoping it's user error. I use Fluval Stratum for my substrate as I was hoping to get plants in there again soon. This may have something to do with it...