You might find that you can lower your chlorine consumption a little bit more by bumping up the CYA level--I'd bump it up to around 40-50. Won't change the amount of chlorine you have to keep in the pool, but it might slow down the consumption by the sun.

I'm told by the chemists that if you're not using stabilized chlorine, then dropping the TA to about 70 will help stabilize your pH. Here's the procedure for lowering TA....http://www.poolforum.com/pf2/showthread.php?t=191 ....and I would think the hot tub blower would be an excellent way to aerate the water!

Janet