Adding Cal-Hypo to raise CH

Billtkat

Well-known member
Apr 25, 2020
89
Oro Valley, AZ
My CH has been at 175 from the last couple weeks and I feel pretty good about my test process on this with my TF100. I have some 73% cal-hypo shock bags and wondered if I just use those to shock the pool every few weeks would that be OK vs adding in CH up to move to 200-250 ? The Pool Math app shows effect of 1 pd being a raise of 5.8 so it seems to be a nice slower way to both shock and keep the CH moving up but not going over the 250 range- With my current test results my CSI shows balance so I am thinking no reason to but something I might not need -
 

markayash

Gold Supporter
Mar 21, 2016
2,118
Marietta Ga
It take a lot of Shock to move your CH, I did that after a 3/4 drain and fill and I don't think it moved it much. I did use them to keep my FC in range
 

Billtkat

Well-known member
Apr 25, 2020
89
Oro Valley, AZ
Yes. Cal Hypo is chlorine and calcium. Select it in Poolmath to guide you on the amounts needed. Be sure to thoroughly brush the area you put it so it fully dissolves.
Thanks - I will do just that. - I know winter is a ways off however my pool stays open. I do not swim but it is not closed - How does someone properly maintain in the winter ? I ask so that I think about what I do now and how it may impact how much I raise my CYA or CH during the summer so next spring I am not dealing with draining a pool or other effects of poor choices now - Last year I did zero tabs and just used shock like 1X a week using the cal hypo 73%.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
31,111
Laughlin, NV
In the winter you test and add the chlorine the pool needs. Depending on your pool, you might be able to go a few days or a week between tests and adding.
My SWCG maintains our FC for all of about 6 weeks of the year. So I just adjust that.