Another Chlorine related question What is the recommended approach to dealing with sun cream? Any special steps needed? I realise no sun cream in pool is the ideal but not practical in reality. I’ve a sand filter.
Just read through this thread. A couple of things to mention:
Based on previous posts, it appears you may have the same color-blind several of us have (mostly men have it). It causes difficulty in the orange-red- purple. Get your wife to check it and don't tell her your interpretation. If this confirms the difficulty get a digital pH probe. I use the Hanna Phep model. Not too expensive and very reliable. Does require calibration but seems to hold for a week or two. Also is not affected by high FC like the drops test. My wife is dead on with the pH meter. I'm all over the map. Never knew I had this before. I pass the standard pattern tests for color blindness.
Your TA level is high and could be contributing to your high pH. Acid addition followed by aeration reduces TA over time but it takes several cycles. Here's how.
I used both a colour scale and also a lovibond photometer and I think both look to give similar results.
I’m very confused by what’s going on though as I added another dose of hydrochloric acid 32 pct that I thought would give me a drop in ph of about 0.1 but seems to have gone up again. As has the TA back to 180. No aeration between adding acid and reading.
im judging my dosing based on the mutraic acid 29pct in the pool math app. But going on the cautious side given it’s a bit higher pct.