Hi all - hoping to for some experience and guidance on stains that I'm dealing with in my pool that I haven't been able to identify or clean. Been fighting algae this summer, finally decided to do a SLAM, as well as taking up to mustard algae shock levels afterward.
Attached (poor) photo, really had trouble capturing this. It looks worse in person and spreads along the entire side of the pool in random patches.
Pool Math Log: PoolMath Logs (yes, I recognize the low FC levels earlier in the summer are the source of my issues in the first place - this was shortly after deciding to splurge for a TFTest Kit and learning how to use it and the app). For context I was previously using Trichlor tabs but have switched over to liquid chlorine given my CYA levels getting a bit higher than they probably should be.
Thoughts?
- 1 year pool owner, trying to learn as much as I can from TFP; pool is prob 30+ yrs old but recently (past 2-3 yrs) re-plastered
- Algae problem seems largely solved, but I have these stubborn green/yellow stains that I can't get rid of
- Been keeping the pool above the "Mustard Algae Min"; from the start of SLAM, pool has been at elevated chlorine levels for almost 2 weeks now
- Bought a stainless steel brush which doesn't seem to help in removing the stains - though puffs of white debris when I brush - am I removing my plaster??
- Rubbing chlorine tablet on stains - nothing
- Rubbing vitamin C on stains - nothing
- Stains are primarily along the South (North-facing) wall of the pool
Attached (poor) photo, really had trouble capturing this. It looks worse in person and spreads along the entire side of the pool in random patches.
Pool Math Log: PoolMath Logs (yes, I recognize the low FC levels earlier in the summer are the source of my issues in the first place - this was shortly after deciding to splurge for a TFTest Kit and learning how to use it and the app). For context I was previously using Trichlor tabs but have switched over to liquid chlorine given my CYA levels getting a bit higher than they probably should be.
Thoughts?