As stated above, please post your water parameters measured by a liquid test tube test such as API fresh water master kit for
-- ammonia,
-- nitrite,
-- nitrate, and
-- pH,
-- also temp,
-- water hardness KH and GH (also by API liquid test),
-- how stable pH and temp are,
-- is the aeration adequate,
-- how you do water changes,
-- how you treat tap water
-- and other essentials.
If all checks out fine, the feeder fish likely transferred a pathogen to your fish. They ALWAYS do if you buy them. Just a question of when, not if. There are gold fish in there too, for the goby? Anyhow, sooner or later, any mass produced feeder fish will transfer a lethal pathogen to your pet fish. There is "only" a billion cases of supporting evidence for that.
-- ammonia,
-- nitrite,
-- nitrate, and
-- pH,
-- also temp,
-- water hardness KH and GH (also by API liquid test),
-- how stable pH and temp are,
-- is the aeration adequate,
-- how you do water changes,
-- how you treat tap water
-- and other essentials.
If all checks out fine, the feeder fish likely transferred a pathogen to your fish. They ALWAYS do if you buy them. Just a question of when, not if. There are gold fish in there too, for the goby? Anyhow, sooner or later, any mass produced feeder fish will transfer a lethal pathogen to your pet fish. There is "only" a billion cases of supporting evidence for that.
