I've been tracking FC, CC, and MPS using the Taylor K-2041 kit (R-0867 Deox Reagent) in conjunction with the K-2006. I've noticed that FC stayed pretty constant all week (FC = ~2.4 and CC = .4) when just adding MPS after soaks and starting with chlorine on Sunday and a level of 3.6 ppm Monday morning. We're soaking about 1 1/2 people hours every other day and adding 4 tbsp of MPS (32.2%) each time.
Questions:
Questions:
- I expected that FC would go down fairly quickly over the week with just using MPS, ozone, and UV (and some sunlight). Any ideas why the FC level stays high? It appears that MPS is registering as FC. Do you agree and is this expected?
- When doing the FC, CC, TO tests, there is a point where the sample water is white - but not the whitest - and it takes an extra drop to get it bright white. I presume I count that last drop. Sometimes, after waiting 15 seconds, the bright white can even revert a bit to not pure white. Do I ignore this or add yet another drop?
- My wife and I noticed a faint "pool smell"and it is objectionable, and we never used chlorine in our previous spa. The only way I was able to get FC down near zero (.2) along with the offending odorous CC (.2), was not adding any MPS for two days. I'm confused how CC dropped only without the addition of MPS (or chlorine).
- MPS level stays between 3 - 5 ppm. Anyone have a target range of what residual we should aim for? This seems high to me and I'm considering cutting it in half. I know and have been using the rule of 7 tsp of 43% MPS per person soaking hour, but perhaps the ozone and UV and doing their job?
- I'm about 10 days in to using my spa. I started with a few doses of dichlor and switched to MPS after soaks and plan dichlor / bleach once a week to supplement.
- I'm up to a CYA level of 25 according to the formula 10 FC = 9.1 CYA (from Pool Math) and plan on stopping at 30.
- TA = 50, CH = 150, Borates = 50, pH pretty steady at 7.6.
- I had to add ~35 gallons after a week - I presume due to hot (90s) and dry days.
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