SLAM- Day 2. Need advice

[AndrewWoo]

Hey guys,

South Florida pool owner here. My pool gets full sun, and the last week or two my chlorine levels have plummeted quickly after I add liquid chlorine. Guessing I have an algae issue, so I'm SLAMMING right now.

I started yesterday afternoon - CYA starting level was 35 and pH was 7.4. Got the pool up to shock level, brushed and maintained. I only lost 1.5 ppm of Chlorine overnight.

At 7 am the FC was 18.5. But at noon the FC was 12. Is this decline normal with an algae problem? Seems really fast to me.

 

[Texas Splash]

Between an algae bloom and the sun's UV in sunny FL, I suspect you're pretty close to the expected FC loss rate. In the first few days it's especially critical to maintain that FC at its target SLAM level. Just do the best you can, and after a couple days it should start to taper-off and be more stable/consistent.

 

[AndrewWoo]

Thanks for the reply. It's reassuring for a rookie!

 

[YippeeSkippy]

Also, if your CYA tube is over 30, but less than 40, you still read it as 40. So make sure you're dosing at the 40 level.

 

[Richard320]

Remember that algae grows in sunlight, so whatever isn't dead by sunrise will start to grow again, which will increase the FC usage over and above the UV breakdown. You're doing well. Many people report almost complete FC depletion between doses early on in the process. Keep hammering that algae with 16 FC.

 

[pabeader]

Also, during the beginning stages you want to check and dose often. Like every couple of hours if at all possible. But at minimum 4 times a day.