davy 1983
Aquarium Advice Activist
today i bought two rainbow fish, to go with the four iv already got, but when i nipped out to go somwhere one had died, i took it back to the lsf and they tested my water which was fine, so they replaced the fish for me, so i added the replaced fish into the tank, all seamed good, so went out for the shopping then when i came back both the new fish and replaced fish were dead! dont understand how though, i tested the water again and my levels were fine, phoned the lfs back an told them about it, told me to bring in the fish and a sample of my water again for them to test again, has anyone got any ideas what it could be?