Tank size:50 gallons
tank temp:86 F
Fish Symptoms My two year old Angel is swimming with his head down in the corner of the tank and twithches off and on. But straightens up and eats and swims fine. The temperature has been pretty warm in my house but there is no direct sun anywhere near the tank. I keep the light off and will keep a fan blowing cool air over the surface of the water during these warmer temperatures. The other fish are acting normal.
Volume and Frequency of water changes: I changed approx. 20 gallons two weeks ago. Added a new charcoal cartridge to the filter and vacuumed the gravel. I usually do this extreme cleaning once a month with 10 gallon water change about two weeks in. I use a product called PRIME to remove chlorine from the water being added to the tank.
Chemical Additives or Media in your tank:
Tank inhabitants: I have two Angelfish about 4 inches long and one black ghost fish about 6 in. long all have been in the tank for over a year and a half
Recent additions to your tank (living or decoration): nothing
Exposure to chemicals:
Digital photo (include if possible):