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Got lazy the last month and haven't been testing as frequently as I was previously. Water looks great, but tested tonight and FC was between 0 and 0.5. I added Liquid Chlorine to increase quickly, but do I need to SLAM if water looks good?

I had a Hayward DE filter that I believe had some torn fingers. When I put stabilizer in the pool it was coming right back out of the returns. I backwashed and fully cleaned the filter and put in new DE and then the water turned cloudy, leading me to believe DE was leaking back into the pool...

Did my routine water test last night and everything was pretty normal. Noticed FC was a little lower than I'd been keeping it (but still within good range) so I added some liquid chlorine. Also added some acid to reduce pH, but it, too, was in range. You can review my PoolMath Logs for more...

Testing my water for an OCLT this morning. First reading was 26, exactly 1 less than last night indicating I’m done SLAMing. Realized I forgot to test CC so I performed the test again immediately after using the same water sample from the pool. This time the FC came back at 22. Tested a third...

TA, CH, CYA all slightly out of spec. Want to make sure it's OK to add these simultaneously. https://api.poolmathapp.com/share/tfp-217950

Just got my first TF-100 test kit yesterday and peformed my first water test this morning about 10:45am - pump and SWG had been running for 2:45 (since 8am). My Free & Total Chlorine seems to be high. I re-tested and got the same results. Here’s results from all of the tests. I’m curious - is...