I've no way to assess anyone's level of knowledge, so when questions are asked I will try to be helpful.
As for the water conditioner, that is obviously a possible of more than one possibles. It may have been overdosed (not suggesting it was), it may have been expired, it may have some other chemical issue. Unless one gets it analysized by a chemist, we're only dealing with possibles.
The fish in question are Glass Catfish, and these are highly sensitive fish to any chemical, so I still say the so-called ich treatment is the likely issue. And the fact remains that all fish are affected by any of these treatment preparations, whether effective or not. Those who know far more than I do or ever will about this tell me not to use ich "remedies" and I have never lost fish to ich since following their advice. It is so easy to overdose (or underdose) but that is something the heat method (which does work provided the fish species can tolerate it) will never cause.
As for the water conditioner, that is obviously a possible of more than one possibles. It may have been overdosed (not suggesting it was), it may have been expired, it may have some other chemical issue. Unless one gets it analysized by a chemist, we're only dealing with possibles.
The fish in question are Glass Catfish, and these are highly sensitive fish to any chemical, so I still say the so-called ich treatment is the likely issue. And the fact remains that all fish are affected by any of these treatment preparations, whether effective or not. Those who know far more than I do or ever will about this tell me not to use ich "remedies" and I have never lost fish to ich since following their advice. It is so easy to overdose (or underdose) but that is something the heat method (which does work provided the fish species can tolerate it) will never cause.