Frustrated with pool chemistry readings!

[BethK]

One more thing - the water looks clear to me.

[Watermom]

What are the ingredients of the liquid shock and the powder shock that you added? When did you add the stabilizer and how did you add it?

Go to Walmart and get several boxes of 20 Mule Team Borax (in the laundry aisle) and several jugs of plain, unscented bleach -- generic is fine.

[PoolDoc]

By the way, "chlorine lock" is a term with no valid meaning. In practice, what pool dealers mean, when they use that term is either:

(a) "something is wrong with your pool water, but we have no idea what",

OR

(b) "we want an excuse to sell you some high margin pool chemicals".

[CarlD]

You cannot have "Chlorine Lock" with a CYA level of 10. To add to what Ben said, "Chlorine Lock" is a false name for the condition that occurs when CYA, ie stabilizer levels are too high for "normal" chlorine levels (ie, FC3ppm or less) to work. This usually happens when someone has used nothing but Tri-Chlor pucks and their CYA level is well over a 100 ppm but are trying to maintain chlorine at 3 to 5 ppm. The answer is simple: Higher levels of chlorine, 8-15 ppm. But with a CYA of 10, that's not possible. So back to Ben's "(a)"--they haven't a clue. As he said, "Chlorine Lock" doesn't exist.