Very interesting stuff so been doing some digging.... Found this...

Bluegills can tolerate a pH range of 4.0 to 10.3 (Trama 1954; Ultsch 1978) but pH levels at these extremes have caused at last partial kills (Calabrese 1969). Optimal levels are 6.5-8.5 based on Stroud's (1967) criteria for freshwater fish.

largemouth bass require a pH between 5 and 10 for successful reproduction (Swingle 1956; Buck and Thoits 1970). Using Stroud's (1967) criteria for freshwater fish, optimal pH range is 6.5-8.5. largemouth bass can tolerate short term exposures to pH levels of 3.9 and 10.5 (Calabrese 1969).

Supports the thought that 7 to 7.5 is ideal but straying a little is still ok, at least according to these guys.

Last edited by Bill D.; 03/12/16 08:50 PM. Reason: Clarification
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