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Strange though. Had about 6 folks in the tub Sunday, so afterwards I put in about 4 tsp of dichlor (a bit extra for good measure). Ran the 10 minute clean up cycle and covered the tub for the night. Monday morning, (6:30) while getting ready for work, I shocked with 4 ounces of MPS and ran the tub for about 40 minutes with the cover off. In my pre cafine daze, I did not check the water. I just assumed a shock was in order...(last shock was 8 day prior. And the folks in it yesterday we all in suits, hot sweaty, fried -turkey coated, wine and beer spilling tubbers)Tuesday night about 9:00 pm , I went for a soak an noticed a strong chlorine odor. Strange. I just shocked and thought if you smelled chlorine, you needed to shock (which I just had done, 36 hours before). I finished my beer and got out. Wondering what was up, I checked it Wednesday morning and the chlorine levels were off the strip (high end)! That afternoon I checked again and were at 5 ppm. My ph was low and I adjusted for that. This a.m. everything is right on the button and I still have a 3ppm chlorine reading. What the hell? My chlorine should be waaaaay down. What is going on. (I'm close to my water change out, but prefer to wait until after the july 4th party, and in the warmer weather, we are soaking less....about 2x a week).
Hey drew:What probably happened was that your tubbers caused the pH to DROP, which made the shock much more potent. This created your very HIGH CL level that hung around, increasing available CL. Some combined and reacted (even AFTER you vented), creating gas under your cover, which is why you smelled it. It was still reacting. When you lowered pH, the CL levels reacted accordingly. I'm a big believer in water equilibrium. When you change (or upset) your usage pattern, stuff happens...BUT, it's ALL good!Drewski
Periodic TA adjustments and life is beautiful.
Folks help me with the spa jargon. What are:1. TA (I know what T&A is)2. N2 or N33. MPS4. Nature 2 or 3. (I have a feeling they are similar to N2 or N3)From what I have read in the past Dichlor is chlorine and I am familiar with ph (acidity or alkalinity).Thanks