50 and 65 are Ok for fish. 75 way too high. 75 would destroy all fish, but hey - most restaurants destroy fish, even specialty seafood places. 50 is great for

50 and 65 are Ok for fish. 75 way too high. 75 would destroy all fish, but hey - most restaurants destroy fish, even specialty seafood places. 50 is great for salmon and tuna. 65 might be better for white fish