I've just noticed 3 big fish have died over night
Tank size: 8ft
pH: 6.6
ammonia: 1.0
nitrite: 5.0
nitrate: 160
kH:
gH:
tank temp: 78
Fish Symptoms (include full description including lesion, color, location, fish behavior): as normal but seem to be gasping for air despite aeration in the tank.
Volume and Frequency of water changes: 1/4 every month
Chemical Additives or Media in your tank: no addidives, 2 big external filters
Tank inhabitants: Chichlids
Recent additions to your tank (living or decoration): None
Tank size: 8ft
pH: 6.6
ammonia: 1.0
nitrite: 5.0
nitrate: 160
kH:
gH:
tank temp: 78
Fish Symptoms (include full description including lesion, color, location, fish behavior): as normal but seem to be gasping for air despite aeration in the tank.
Volume and Frequency of water changes: 1/4 every month
Chemical Additives or Media in your tank: no addidives, 2 big external filters
Tank inhabitants: Chichlids
Recent additions to your tank (living or decoration): None