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I thought this was pretty cool. It shows how the chlorine in our 40k gal pool is destroyed by UV during the day and then how I verify that there is nothing consuming the chlorine overnight with what's effectively an overnight free chlorine loss test. The points on the graph from Sutro tests...

Happy Friday team! Question for those with TFP test kit. I measured my CYA and the dit disappears just when the tube is completely full. Would you call that 10? I added 2 gal of Natural Chemistry liquid stabilizer 3 days ago so if 1 gal raises 10K to 32ppm I figure mine should be at ~15. I'm...

So when I test for Cl, I don't really need a "heaping" scoop of R0870 powder to get a stable color of pink, and from my tests I can't tell a difference in the results - admittedly I haven't run a good experiment to validate that, but if someone already has then no need. Anyone else use just...

Happy happy happy now, I have room for all the bottles and gadgets in one handy box! No more dropping stuff on the way out to the pool... Amazon

Just for the fun of it, sharing pHin's behavior during SLAM (it uses ORP vs Cl ppm FYI). Kind of interesting it tells me it's safe to swim still.. I started at ~30-35 CYA last night and dropped to 7.2 pH and then hit 15 ppm with HADA liquid chlorine. Forgot to turn liquidator last night and it...

I have a HASA Liquidator and am trying to test the Cl ppm with TF-100. First test with heaping spoon of reagent wouldn't turn water pink so I added a little more and it turned brownish so I added more and got dark pink. Tried using the drops as instructed to titrate and it never would turn...