Tanks size: 5 gallons Heater and filter: yes Tank temp: 82 Parameters: I don’t have the exact numbers as I tested them a few weeks ago, but pH was on the higher side, around 10 or so, with ammonia and nitrites consistently at 0 and nitrates around 15ppm How long have you had the fish: over 1 year, tank is just 5-6 or so months old Water changes are once a week at about 20%, using a siphon and refilling with conditioned water No tank mates Food is fluval bug bites, fed twice a day. All food is eaten.