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I am curious about acceptable heat range for room/chamber. 24-35 C (75-85F) is OK? (that's about 75-85F) Also, running two 400's at about 34-35 cM (11-12 in.) from Bulbs...too close? And a final newbie thing... pH's at 8 coming from tap... is adding bacon soda advisable? Or Lye? Pool pH test is...