we're in process of changing to BBB and working towards getting water under control, had high CYA and CH and performed dump/fill of 70% of 20Kgal pool. I have Taylor TF-100 test kit and believe I'm on right track (with help from this site) and have a few questions that I need some help (reassurance) on.
Here is my recent chemistry history, my testing and pool store testing:
My test Pool Store
pH 7.2 7.1
FC 4.5 2.6
CC - don't report
TC 4.5 4.2
TA 130 108 reported as Tot. Alkalinity - Adj Tot Alk is reported to be 79
CH 330 349 reported as Tot.Hardness
CYA 60 96 (with target range reported as 30-200)
temp 88 90
The pool store analysis says their results are designed for use only with BioGurard brand products. Am I correct that they have established thier own scale for reporting results and they can't be squared with this sites target range?
Also the pool store print out convienetly tells us what chemicals to add to bring things in balance. They indicate the TA is low and Balance Pak 100 is required. I've been working to lower my TA by aerating (was 160, now 130 and targeting for 110 ). Why would the PS results tell me the TA is to low??
One more thing, at 7:30am the FC was 6. At 10:10 my wife tested FC at 6. At 1:00pm she had the pool store test (results above) and they report Tot Chlorine 4.2 and Free Chlorine 2.6. At 7:00pm I test FC at 4.5 which seems like reasonable loss of chlorine from am to pm (full Tx sun and 100deg) How can pool store come up with the FC/CC results they did? The store is within .5 miles and sample didn't sit. Are there results completly unreliable? Is there algea growing in pool store sample bottle (hmmm have to check that) Using the pool calc and this site I can at least predict and see expected results...