Aeration / Acid Treatment to lower Alk

[Donski]

Yes I mean Calcium Hypochlorite.
I had a range on the Chlorine because it was over several days and the chlorine was changing. We have Leslies Pools here in town and I have been using a dropper kit from them. A good part of the chlorine changes was due to tablets which I have already removed. I wasn't adding to the chlorine while I was mixing in Muriatic Acid. I mixed in another lb of CalcHypo last night to wake up this morning to a level of 2. Today the pool has been at 80 degrees and the cover was off. Also I did a lot of cleaning of the water line with 'Descale-It' which has clouded the water a little. Tonight the level of chlorine is undetectable and I double checked it with a strip. I have added another lb of Calc Hypo tonight. The store doesn't stock liquid chlorine and lithium hypoclorite was coming from another store.

What might be some of my problems I have found is a buildup on the pool walls. As I scrubbed the water line, I find the pool is blue and not white. I only bought the house last year and it already was this way. The white covers the entire inside of the pool under water. I am not sure what to do about it. I am assuming it is from years of high Alk. Last year when I went to the pool store, they said the high alk was natural for this area and not to worry about it. Now I have this problem. Will a lower Alk help remove it very slowly? Is this what is called scaling? I have spent hours scrubbing and only manage to clear off a small area. How do you rid an entire pool of white walls? Right now I am trying to get rid of a dark waterline.

I read on another forum topic or on the Internet the Calcium Hypo can affect the TA by raising it and with my Calcium in range, I didn't want to add to it too much. I'll keep an eye on the calcium level to use up the CalcHypo I have. I believe standard bleach from the grocery store can be used. Can you provide insight as to what to by and how to use it?

I understand the CYA won't go down by evaporation but I figure it is concentrated because of the lower water level. I didn't realize the 100 might be a max reading for the test kit. I have AquaCheck test strips for CYA which goes to 200 but they show 100 the same as the pool store.

[Yeggim]

Scrape some scale off the side and collect. Put in a glass or bowl--pour some vinegar on it--if it's calcium it should bubble and/or fizz.

You need to get a good test kit.

http://poolsolutions.com/testkit-order-links.html

[Donski]

Some scrapings in a bowl with a few drops of vinegar and there was no bubbling or fizzing.