Long time lurker, first post here. I've learned a great deal from all of you so before I ask my question, first off THANK YOU !!!
Okay, so this is where I'm at.
pH - 7.5
TC - 4.0
FC - 4.0
TA - 100
CYA - 70-75 (hard to say for sure looking for the black dot at the bottom of the test tube)
Salt - 3400
SWG - 35%
Pool water temp - 87
Pump runs 8 hours 10AM - 6PM
Yesterday I noticed for the first time that my pool water was a little cloudy. Earlier in the week (Sunday AM) I added more pool conditioner to get my CYA up to where it is now (as per the TFP recommendations). I did NOT raise the % on my SWG after I did this. On Sunday my TC was 5.0 and my FC was 5.0
So now I have some mildly cloudy water. The temperatures here have been getting higher, with today expected to be in the 90s.
What I postulate is happening is the warmer pool water and warmer weather in general is making my chlorine break down faster (even though I added the extra conditioner), and with my TC/FC hovering around 4 I'm right on the edge of not having enough chlorine in the water. So yesterday evening I bumped my SWG up to 45%.
Pool is vacuumed 2x a week w/ a Dolphin M500 robot. Filter is not showing any significant pressure gain necessitating a backwash. I DID scrub the walls and floor perimeter on Tuesday evening - perhaps I let some junk loose in the water that just needs time to filter out?
So - until I hear from you guys I'm going with:
1. Need to raise my CL to 5.0
2. Pump needed more than 8 hours the day after I brushed the walls and floor clean (pump had just turned off when I did this, perhaps that was a bad idea as far as timing?).
Natural free-form pool
Vinyl Lined, 6' Deep End, 21,400 gallons
2 hp pump, SWG, Heat Pump, Sand Filter
2 skimmers, 2 floor drains, 10 returns (6 in the pool, 2 in the steps, 2 in the swim-out)