Chem log, to see....

[Charlie_R]

Update for today's readings:

Using the HTH 6-way, I get Chlorine holding fairly steady all day at 1.5~2 about halfway between the two shades, with only 1 dose of bleach this morning. Added another dose after testing this evening. pH is slowly dropping from the addition of the CYA, I expected a much faster drop here, reading this morning was 7.4, tonight's was 7.2., But then I am still aerating for ~12 hours a day. Wife doesn't want me to run the pump at night. However, the TA and TH are both slowly dropping.

To verify I am interpreting the tests properly, here is what I'm seeing. At 22 trops of titrating solution, the color just starts to change. at 23 drops the color has changed completely, at 24 drops, the color deepens. no further change at 25 drops. Would this be called 230 or 240? I'm inclined to think 230, since the addition of one more drop only deepens the color. Both the TA and TH showed at this level.

Since I lost only a small amount of chlorine to sunlight today, I took a chance and did a CYA test. I'm guessing ~20, since the dot disappeared right at the point of overflowing. I have added 2 lbs out of a 4 lb container of the CYA, and will continue until it's gone.

I think I for sure need the K-2006 kit, but unfortunately that will have to wait till next payday before being ordered.

Interesting to me is water so clear that you can identify what the black spot on the bottom of the pool is, whether it's a dead fly, spider or piece of a leaf, through almost 4' of water.

Charlie

[Watermom]

I'd call it 230 but a 10ppm difference on that test is insignificant, especially when it is that high.

I'm not sure if anybody has talked to you about lowering your alk in a different thread. Please read the following:
Lowering Alkalinity Step-by-Step

Using Muriatic Acid Safely

By the way, CYA doesn't really have much effect on pH.

[Charlie_R]

Thanks, Watermom!

I was unsure of the strength of the CYA on the acid scale, so I'll go ahead with the muriatic to lower the pH, and continue to aerate until the TA and TH come down.

Charlie

[Charlie_R]

Here are a couple of pics of what I was using to circulate/aerate the water, and what I'm using now:



I don't know if copper would leach from the fittings or not, but from what I've read here, it may not be something I want in my pool.

So, I made this with a replacement cap:

[Watermom]

Very clever! Thanks for sharing that pic! (And, you're right. You do NOT want copper in your pool.)