Moved from here.
I'd like to piggyback here, as I'm about to start a SLAM myself.
I'm trying to get rid of 2 tiny spots of black algae (both less than dime size), one small spot of green algae (less than a quarter), and the remnants of mustard algae (this was kind of bad, and I shocked it before reading here). That's been about a week. The black algae is still present, the green algae appeared after the shock (but in the spa, and I'm still working on getting my equipment working correctly). The yellow algae seems much better, but I'm not convinced I actually killed it--I don't think I got close to the PPM I needed to kill it.
Numbers from yesterday afternoon:
I'd like to piggyback here, as I'm about to start a SLAM myself.
I'm trying to get rid of 2 tiny spots of black algae (both less than dime size), one small spot of green algae (less than a quarter), and the remnants of mustard algae (this was kind of bad, and I shocked it before reading here). That's been about a week. The black algae is still present, the green algae appeared after the shock (but in the spa, and I'm still working on getting my equipment working correctly). The yellow algae seems much better, but I'm not convinced I actually killed it--I don't think I got close to the PPM I needed to kill it.
Numbers from yesterday afternoon:
- FC: 1.5
- CC: 0.2
- pH: 7.8
- TA: 100
- CH: 190
- CYA: 50
- For FC, when entering the % bleach, is that the % sodium hypochlorite listed on the bottle, or the % yield of chlorine (which is less)?
- Target FC for Mustard Algae under "Suggested Levels" says 24. The Chlorine-CYA chart suggests 20. I've read online and heard from a pool company that I should target 30. How is the calculator adjusting for targeted FC, and what level should I actually use?
- I want to lower my pH to 7.2 before treating. I'm going to pour acid in tonight to do that. Should I wait until tomorrow to start the SLAM?
- Do I need to worry about adjusting the CH before starting?
Last edited by a moderator: