Mustard Algae - SLAM?

Jmg_moocows

Member
May 17, 2021
9
Oxnard, CA
Pool Size
23400
Surface
Plaster
Chlorine
Liquid Chlorine
Although, I maintain my FC #'s and do not have CC > 0.5 ppm, we didn't use the pool for 2 weeks and found mustard algae (I think) on the steps/wall by jacuzzi. I removed the bubble cover, brushed the entire pool...it hasn't come back. I was planning on doing a SLAM, but I pass the 3 criteria so I have a couple of questions:

Timeline:
Aug 27 algae found on steps and partial wall near steps; remove bubble cover brush, vacuum everywhere
Aug 28 @ 8:30pm FC = 6.8, CC = 0.5; No algae re-appearance
Aug 29 @ 8:30am FC = 6.6, CC = 0; No algae re-appearance, pool is clear, OCLT passes, CC below 1
Aug 30 - Sep 3 Maintain normal #'s, still concerned but no algae has re-appeared; average Chlorine usage is 1 ppm during this time
Sep 3 @ 9:15pm FC = 6.5, CC = 0
Sep 4 @ 7:45am FC = 6.5, CC = 0, OCLT passes again, pool remains crystal clear, was never cloudy (see pics)

Current #'s
FC = 6.5
CC = 0
pH = 7.5
TA = 70
CH = 650
CYA = 40
CSI = 0.10 (water temp averages 85 deg so I keep pH lower than ideal)

1) Should I do a SLAM?
2) If so, do I go straight to MUSTARD SLAM since I already pass all 3 criteria for SLAM?

20210904_121909.jpg20210904_121920.jpg
 

red-beard

Gold Supporter
May 27, 2019
1,395
Houston, TX
Pool Size
25000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite Pro (T-15)
Is this at the bottom in the middle? MA forms in dark, shaded areas. Might be pollen or debris in the pool.
 

red-beard

Gold Supporter
May 27, 2019
1,395
Houston, TX
Pool Size
25000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite Pro (T-15)
Is this a heavily shaded area?
 

red-beard

Gold Supporter
May 27, 2019
1,395
Houston, TX
Pool Size
25000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite Pro (T-15)
I am skeptical it is mustard algae
 

Jmg_moocows

Member
May 17, 2021
9
Oxnard, CA
Pool Size
23400
Surface
Plaster
Chlorine
Liquid Chlorine
If it comes back, I'll snap a picture of it on the steps... So far, everything looks good without SLAM being done
 
Thread Status
Hello , This is an inactive thread. Any new postings here are unlikely to be seen or responded to by other members. You will get much more visibility by Starting A New Thread