Higher the temp, the higher the respiration but higher temp water holds LESS DO (Dissolved oxygen), it's very stressful, slime coat is thinner and harder to replace when temps are above 60. It's very, very stressful on them and if things are not perfect, expect high mortality rates.
Sorry, I should let ewest speak being you ask him, but I've been down this road many, many times..


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I agree ! Well stated.