You need to remineralise the RO before it goes into the tank. Sudden changes in hardness cause stress, so it’s only a matter of time before you have problems. The water going in must be the same hardness as the water in the tank.
Tropical fish
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black ghost
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Welcome to the forum.
You need to remineralise the RO before it goes into the tank. Sudden changes in hardness cause stress, so it’s only a matter of time before you have problems. The water going in must be the same hardness as the water in the tank.
You need to remineralise the RO before it goes into the tank. Sudden changes in hardness cause stress, so it’s only a matter of time before you have problems. The water going in must be the same hardness as the water in the tank.
I don't keep fish, I keep water. Water keeps fish.