I recently got a SWG for my above ground pool (in sig). After adding the salt to the pool algae grew overnight on the bottom (or what I think is algae). I drained the pool, scrubbed the pool with a water/bleach mixture and filled again. No issues with just chlorine in the pool, but once I added the salt the algae came back again. However, the algae wasn't AS bad the second time around. I started the SLAM process about 3 days ago to get rid of the algae. I have been scrubbing/vacuuming the pool, as well as clearing debris and cleaning the filter. The "algae" on the bottom of the pool breaks up very easily when I go over it with a scrubber/vacuum. Almost like a powder would if you blew on it.
I read through the pool school and used the SLAM FC numbers for a CYA of 75. I recently saw this thread and bumped my FC numbers up to the Yel/MstrdShock numbers (the pool store told me it was Mustard Algae). I have a Taylor K-2006 kit, so I'm using my numbers from that and not the pool store numbers. I started the SLAM process a day before getting the Taylor kit in the mail, so I don't have accurate numbers from the 19th of July. The kit I was using didn't have accurate enough tests.
pH was balanced to 7.4 prior to starting SLAM. CYA is at 75.
FC 8.6 (added 11% chlorine from poolmath to get to 30.5)
28.5 FC (added 11% chlorine from poolmath to bring back to 30.5)
27 FC (added 11% chlorine from poolmath to bring back to 30.5)
24.5 FC (added 11% chlorine from poolmath to bring back to 30.5)
FC 27 (added 11% chlorine to bring up to 43 for Mustard shock levels)
FC 19 This is after adding enough 11% to bring it up to 43. (Added 11% chlorine to bring back to 43 per poolmath)
I'm very worried something is wrong. Since starting SLAM on the 19th I've used almost 1.5 gallons of liquid chlorine. Seems like a lot for a small above ground pool that has clear water.
1. Is the stuff in the below pictures algae?
2. Am I correct to continue the SLAM process?
3. Any recommendations/suggestions/comments etc. on what I should be doing or am doing?
Any help is greatly appreciated. Thanks!
Stuff on bottom of pool first time I added salt (I drained pool and started over)
CURRENT stuff on bottom of pool: