trennamw
Aquarium Advice Addict
Most every treatment I see anymore treats both chlorine and chloramine.
can you use to much of the prime its strong stuff 5mils for 50gals
Sent from my C5170 using Aquarium Advice mobile app
Prime is awesome, I do not suspect the prime being the problem at all.
What fish are we talking about? Some are a lot mores sensitive than others.
Do you clean/stir you substrate often?
Are you filling the tank higher than it previously was? How do the fish behave before they die/after a water change.
I had a friend who was putting too much water back in, to the point there wasn't enough surface vibration, the water wasn't being oxygenated, and fish would die.
That seems weird.
The most likely problem is the water you are putting in is very different than what is in the tank, either temperature, hardness, or PH. Or there is something wrong with the fish, not coping to the stress of a water change.
I would test your plain tap water. Then add Prime and test it again. Then test the water in the tank and compare.
In the meantime try doubling the amount of prime (you can use 5x the normal amount safely)
Maybe there is just too much heavy metals or chloramine, or something then a simple dose of prime will take care of.
That's a tough one, keep us updated, and tell us more about your fish, especially their behavior before/after a water change.