Simon Posted September 14, 2010 Share Posted September 14, 2010 Theiere's comments, I believe, are all correct - I certainly meant Sodium Bicarbonate for the TA! As for CYA "lock" Theiere is correct - you do have to put more Chlorine in the pool - as we found out when choc'ing.........There are other posts which reference a table to show how much Chlorine is needed at different CYA levels. Chlorine / CYA Chart).One other thought I did not mention - I believe it is essential to get a good pool testing kit. I think without this I just would not have been able to get accurate figures for the Pool Chemical Readings and hence would be "flying blind".I have both the PoolCool Cl/pH/TA and the Scuba+ Cl/pH/CYS and can recommend both. Link to comment Share on other sites More sharing options...
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