I've been a long time pool user - my above ground vinyl pool has lasted 10 years and still going strong.
I've always been of the belief that FC should be maintained at a level of 1-3ppm, pH - 7.2 - 7.8, TA - 80-120, and CYA between 30-70 (according to my old TF100 kit instructions). So far, these levels have kept my water crystal clear.
Now reading around TFP, pool school and PoolMath, the recommended levels all seem to differ.
Pool School Recommended (for bleach) PoolMath (setup with TFP goal levels) FC 3-7 6-11 pH 7.5-7.8 7.5-7.8 TA 50-90 100-120 CYA 30-50 30-50
I use trichlor in my pool.
We had a thunderstorm last night and this morning I had these levels:
FC - 0.4
pH - 6.9
TA - 61
CYA - 81
I use a Scuba II to test. I could try to double check with my TF100 but i don't know how good the reagents are...
What would people recommend I do? Boost FC to 1-3 or 3-7?