High CYA/CH

[waterbear]

Reposting because I may have put this in the wrong forum originally:

I have a similar problem and seeking advice. I've stopped using pucks after learning about this site from a friend and having read enough to convince me the BBB method is the way to go. I have been fighting cloudy water and algae off and on for a while, and now beginning to understand why. I have an approx. 23k IG gunite pool. Initial readings from the Taylor K-2006 kit showed:

FC= 2.0
CC=0.5
CYA=100+
Cal Hardness=700
Ph=7.3
Tot Alk=250

Dilution was in order, so I drained roughly 2 feet of water out (it was painful to watch, and wasn't sure how far to go with it....). Next day results after refilling:

FC=0
CC=0
CYA=100+
Cal Hardness=575
Ph=7.3
Tot Alk=Not tested

Shocked per the Best Guess chart for the next 3 days.....I have not checked yet today but last night:

FC=7.0
CC=0.5
CYA=100+
CH=600
Ph=7.4
Tot Alk=170
I noticed your CH went up after shocking. Are you using Cal Hypo to shock? I would not use it since your CH is so high already but stick with sodium hypochlorite (bleach). Remember , shock is a verb (something you do to a pool to raise the FC level), not a noun (a specific product you add)!
I added bleach to bring the FC up to the 10.0 range. The water is not perfect, but better than it has looked in a while.....acceptable even, and no apparent algae.

I wish there was another way to lower the CYA and CH other than draining more water out. I have no plans to remodel the pool any time soon. I have not investigated the aeration of the pool water mentioned but will do so.

Should I just keep the FC level high due to the high CYA and follow the chart, or bite the bullet and drain yet again (and if so, how much?). I live in Texas, and the sun is plentiful and water from the sky is scarce lately (i.e. water bans will be in effect soon).

Thanks for any replies, and pleased to have learned about this site!

I would keep draining and refilling until your CYA levels get into range. Also you might want to test your fill water to determine how much calcium is in it. If it is very high then you might need to deal with thie calcium by using a sequesterant that has a high chelation ration for calcium (try googling 'calcium hardness reducer' if your pool store doesn't carry such a product. They are out there.)

[Gracy101]

Richard - can I sit next to you in class?