Do chloramines have to be removed if only a small amount of water is added to an aquarium or pond to make up for evaporation loss?

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Do chloramines have to be removed if only a small amount of water is added to an aquarium or pond to make up for evaporation loss?

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To know for sure, you will have to monitor for total chlorine residual. Chloramine residuals in water used to keep fish should be kept below 0.1 mg/L. Total chlorine test kits are available from pet stores, pool supply stores and chemical supply houses. Make sure, however, that the kit is for total chlorine or combined chlorine, not free chlorine. A free chlorine test of chloraminated water would read zero but still be toxic to fish.

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