Last night my son and I dosed the pool from 3.5ppm to 7.5ppm with accuracy, we planned for a sunny swim day with an extra .5ppm. We were having a bleachpm lesson, so I am 100% certain of the dosage. About 3 hours later H and I added the salt in preparation for the SWG install. We added 110 pounds of salt, brushed, and let it filter (as always).
I did not run a morning test today, for two reasons: 1) I rarely do morning testing after dosing at night, and 2) most of my day was spent looking for and posting flyers for our missing kitty.
I lost some water today while working on the pump lines and had to refill but I also refilled yesterday the same amount. Would have been nice if the kid told me the water was actually pouring out on the ground when he mentioned the pump was apart and I told him "yes, I did that don't worry".
Yesterday people swam a lot, I refilled, and still ended the day at 3.5ppm.
Today, 1 short swim right before I tested, salt ~3000ppm, and a refill just like yesterday.
End result at about 7pm... NO CHLORINE. Sample never turned pink after powder. I did not make a mistake, I always dose like this and I am positive about amounts added. I've never lost this much chlorine in one day. I do not know how long it was at 0 but I did notice earlier today that the pool didn't smell fresh like it usually does. It smelled... dull and weird which I chalked up to the salt (which the kids don't like the taste of BTW).
FWIW... I thought I saw a funny tint to it in the sun this afternoon as well. I'm not going to say green because it wasn't really green... but it wasn't what I'm used to seeing and wasn't cloudiness. It was a slight tint of color and the only reason I noticed it is because there is usually no tint at all.
I dosed the pool up to 7.5ppm and will go now to test for CC. Filters were again plugged, so another double filter cleaning was in order. This time I just put the old dryer sheet filters back in because I needed the bleach to mix up fast at that point. I'd rather have fines in the bottom than algae thank you very much.
I'm sure there's no reason to think the salt did this but I'm very sure about my methods, dosing, and pool behavior. This does NOT happen.
Last night's tests:
FC - 3.5
TC - 3.5 (dosed to 7.5)
PH - 7.5
TA - 90
CH - 30-40 (old 3 reagent alk says 40, HTH says 30)
CYA - 40
Borates - 50
I will come back and update w/new results in a bit.
FC - 4
TC - 4.5
CC - .5 (slight tint)
I just dosed to 8ppm. Will test in half an hour. This is weird... Glad I didn't raise CYA yet.
FC - 8 (or 8.5, a double drop may have landed)
TC - 8.5
CC - .5
(I did add a little over half a cup extra bleach at 10pm as a tip for the pool gods)
I will probably test in an hour or so and see if it's fallen. H is convinced he "sees" algae since I said I thought I saw green earlier. It's not green at all. Far from it. He's not to be trusted, he just arrived on scene, lol.