did your fish die instantly or over the course of a week? if it was during the same day, then I suspect it was the change in temperature, as like Nick I've changed my water without dechlor many times before with no fish losses. Dechlor is used so that your biological filtration isn't killed off, which results in an ammonia spike which results in dead fish.magic said:I forgot to and i lost all of my brichardi cichlids. Also dont add too much cold water at a time...
