I think Charlie_R has given you good advice. You are ok with CYA at 30 but if you find that you have trouble keeping chlorine in the pool through a hot sunny day, you may want to bump it up some as he suggested. If not, then you are ok at 30.

Your pH is ok at 7.8 actually, (though it is ok to drop it some if you want to), but if it goes any higher, then you do need to lower it.