Four (roughly monthly) winter tests & treatments of acid & Chlorine since last season
4/3/11 – spring opening
pH 7.8
FC 1
CC0.5, no need to shock
TA 50
CH 225-250; lets say 240?
CYA 25
Borates 30 (kind of hard to believe since I only added Borates in 5/2009 but I also had two females read the Borates test strip in 10/2010 and we all agreed on 30)
Temperature 57F
Water clear, typical winter debris on floor
4/4/11
pH 7.2 oops, no worries, a calcium scaling issue anyways
FC 4.5
CC 0, verifying my good fortune, I’m on the fast track for a shockless season
4/12/11
FC#
CC 0
pH (on 4/10/11) 7.4, I’ll check it tonight, it should be in range, if it is high I’ll get it to 7.5
Temperature 67F
My pool seems stable.
Last year I got a CYA of 50 & that seemed good, so I should repeat that Target I assume? Last year I Targeted CYA of 40 on 6/30/10 but it tested CYA 50 on 7/17/10
TA is a bit low but last season you guys figured (page 4 of this thread Jason Lion) I may be better off a tad lower than the “recommended level†since my pH always creeps up & lowering it reduced the amount of acid needed.
I need to add calcium per ChemGeek (page 5 of this thread) because I have this Calcium scaling issue that I’m going to leave alone until a re-plaster is needed ( tried all kinds of treatments last year, no help, forget it- I can live with the esthetics). There are a couple a ways to ad Calcium. From the Pool Calculator:
“Dichlor and trichlor add CYA and lower pH. Cal-hypo adds CH.â€
“calcium chlorideâ€
“calcium chloride dehydrateâ€
I have on hand most of a 45 lb pail of Leslies Calcium Harness Plus (calcium chloride) more than 2 years old.
1- What is best way to add calcium in my situation (realizing I need CYA too, and assuming you are still happy with my TA at 50)?
2- recommended CH range is CH 250-350, what CH Target should I use?
3- Want Me to Target CYA of 50 or 40?
4- Any order of treatment? I ‘ll get the pH correct first if indicated but for the CYA & CH, any certain order you recommend?
Thanks