I have maintained my pool myself since it was built, and thought I was in good shape. I joined TFP and bought a TF-100 test kit. Then I noticed CYA 325 (due to use of tablets,) CH 925 and TA 170. Despite all of this, the pool is sparkling and I have no algae. I brought the CYA down to 200 using Bio-Active [3 times]. I'm back to liquid chlorine and no longer use my tab feeder. Chlorine is 3 and pH is 7.5. TA lowered to 150 so far. I know I need to drain the pool. I have never done this. Due to drought conditions here in the Los Angeles area I am debating waiting until the fall, or perhaps paying to truck in some filtered water and do it now. Do you recommend I drain the entire pool and should I do it now? Thanks.