polyvue said:
HardTrance9 -
How does the MS pool look these days? Is the water any clearer after the drain/refill?
Last test results posted on November 2: CYA = 100 ppm and pH = 8.2
Keeping the Free Chlorine up?
I'm beginning to feel like these pools are my kids, so can only imagine what you feel.
Hi there!
My pleasure if you fill these as if they are like your kids hehe..
Ok, so today we are preparing everything to shock the pool.. (MS on my signature)
Today's results after emptying 50% of the pool and refill with fresh water:
FC: 0 (before 6.0)
CC: 0 (before 1.0)
pH: 8.2 (before the same)
TA: 170 (before 150)
CH: 250 (before 400)
CYA: 40 (before 100)
So I as read, first is to lower the pH.
Pump is running (already did the backwash for 1 minute and cleaned the filter for 30 secs. ... lots of green water came out, until it was cristal clear...). Also the pressure was before 9 PSI and after this, it went up to 15 PSI.
We bought Muriatic Acid from Alen, but here they don't have in the label the % of this acid... today is a Holiday here, so no one I can reach...
So we added 1.2 liters of MA considering the effects if it's 15.7% or 31.45% aprox. Will test in 10 more minutes (20 min. already passed).
After the pH is lowered between 7.0 and 7.4, we have two options:
We have Cloralex from Alden (green bottle, sodium hipclorite, 900 ml each) and we have lots of Trichlor powder..
Reading the Chlorine/CYA chart from Chem Geek and Pool school, it says that for CYA level of 40, my shock level should be 16?? Is this correct?
I was planning to add Trichlor to raise a little the CYA and the FC.. Planning on add 650 grams or 23 Oz so, FC would raise by 17 and CYA by 10 (final CYA would be 50??, not sure if this is how you read it?) and lower pH by 0.91.
Or do you recommend adding only Cloralex liquid 5.25% 350 oz or 10 liters to raise FC to 16 only??
Any help would be appreciated during today... as I will be spending hours here...
Many thanks!!!