A few months ago I had to take down my 9 gal due to an INFESTATION of small, white worms. I then put EVERYTHING that came in contact with the tank through HOT, TAP WATER. I dried EVERYTHING out for several days, even the plants (except I did it for 1/2 hour). I then put the plants in a tiny tank filled with cold tap water and frequently checked for worms. I washed out the tank and cleaned the gravel. There was no sign of worms so I set it up again. (I didn't have any fish in there)
Now, I've added my betta, Suzuki, and the worms are back!
The worms are a few millimeters in length, are white, float around but sometimes "wiggle" and they create worm-shaped cocoons on plant leaves, in/on the gravel, on equipment/ornaments and in the filter. However, when you brush off these cocoons, there is no worm inside them!? I don't think they are Planaria as they don't stick to the glass.
My tank is a 9 gal, filtered, heated, planted (java moss, water wisteria, cryptocoryne, unknown plant) and has a homemade cave. I do water changes once a week (33% may be increasing to 50%) and also do a gravel vacuum at that time. I feed my betta Hikari Betta Gold pellets and I have tried giving him bloodworms. I NEVER overfeed. I know this because I watch him eat all of the food I give him.
How can I get rid of the worms!? Any tips?