Its going to be tough to rule out poor water quality as the cause of this with out a test kit.
How many fish on the tank ? Tank size ? Filtration ? How long has the tank been up and running ?
Its going to be tough to rule out poor water quality as the cause of this with out a test kit.
How many fish on the tank ? Tank size ? Filtration ? How long has the tank been up and running ?
When ever ive encountered this it was with new fish, shipped or kept in poor water. Lots of water changes helped. If you were able to test the qater we xan rule out poor water quality and or somerhing in your tap water.
Tank seems to be cycled since its been up and running but again no way to tell if you potentially lost the cycle with out testing.
Whats you water change routine ? How much and how often ?