Correct me if I am wrong, but a ph of 6.3 is quite low. Clear water and low ph should indicate a likely low alkalinity and acidic water?
Liming would bring the alkalinity back in line and lessen the wild ph swings that would likely occur during the day.
What I was told by a WDNR fisheries biologist was that water in this type of range typically will sustain "ok" populations of LMB and bluegills, but not much more. Before I would add fish I'd get the water chemistry in order and see what nature can do on it's own with what already exists.
I think I read that they have a $16,000 budget?
Again consult an expert, but I'd be liming for stability first.
A pH of 6.3 isn't that low as 7 is neutral. Low to me, would be like 4.7.
