I thought I read in another thread that it is not recommended that the spa should spillover into the pool 100% of the time. Mine has been for 20 years and I am always fighting high ph issues. Where can I get more information on this issue? I have an Aquatrol controller with jandy valves so I believe I can change up the program to adjust the time in pool/spa mode. I guess my only question would be is how to keep the spa filtered and chemically balanced?