“Chlorine is an oxidizer, which burns a fishes’ gills. Chloramines, on the other hand, pass across the gills of a fish and into its blood, where the molecule attaches to the hemoglobin, acting like nitrite to induce methemoglobinemia. The toxicity of chloramines is affected by pH, I’m reading at FishDoc, with Chloramine-T more toxic at lower pH. Fish stricken by chloramine poisoning are sluggish and respire heavily.”
And we thought it was from over-training!?