Hi, I have a 2.5 gallon with one betta and 3 tetras. I had java fern and amazon sword plant. Everything was cycled and thriving for 4 months. Then my water started getting really cloudy, dense. I used a microscope against the glass and see clear flag worms, they look like planaria. They crawl like inch worms. They are millions of them in all areas of the water. I tried fish fendbendazole and it did not work. I tossed the plants and the gravel. I bleached the tank and the tiny hob filter. New seachem matrix. New water. All was fine first few days. I added seachem stability to help with cycle and using prime. Now it’s back to full infestation. I just dosed again with dog panacure c. Any ideas? I am only feeding once a day. It’s bare bottom tank. Very frustrating and not sure how to deal with this. Fish look aggravated with water dense from worms. Thanks!