I've had him for like 4 months, he's had this for like 2 weeks, clean the tank/substrate weekly, water changes prob 25% once a week between cleaning days. All I added recently was some real plants. I use water conditioner, everything reads fine when I test water. I used betta fix for like a week and seems worse in the last few days. He acts fine, eats the same. I ordered general cure which just arrived today so I'm going to try that and see what happens.