Chlorine Lock ????

[poolrescue30]

The pool is absolutley perfect, crystal clear !! What is interesting is that I had a green "stain" about 12 x 12 inches on the liner in the deepest part of the pool. I know that's where the leaves that were in the pool when it was closed last year. I thought the liner was stained from the leaves themselves , but now after all the LC and Calcium hypo shock. It is gone. I'm assuming it was some kind of mildew or mold on the liner that was eating up all the FCL ? How do I prevent this in the future ??

[CarlD]

The pool is absolutley perfect, crystal clear !! What is interesting is that I had a green "stain" about 12 x 12 inches on the liner in the deepest part of the pool. I know that's where the leaves that were in the pool when it was closed last year. I thought the liner was stained from the leaves themselves , but now after all the LC and Calcium hypo shock. It is gone. I'm assuming it was some kind of mildew or mold on the liner that was eating up all the FCL ? How do I prevent this in the future ??

You maintain your FC levels EVERYDAY and vacuum and brush your pool at least once a week!

(BTW, congratulations on a successful fight!)

[poolrescue30]

Thanks CarlD , couldn't have done it without you, Chem_Geek and the other posters. It was a very long fight, wors one I had in 11 years of pool ownership. I did a CYA test myself, once yesterday and again today CYA is clearly 50 using the tube and black dot test, so I think we're in good shape, thanks again.

[CarlD]

I guess that means it's time to put your pool to an unusual use...
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GO SWIMMING!!!!!