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Thanks! Since I’m new to this I retested the CYA again just to make sure and now I’m at 60. Since the test is very subjective I’m not sure what level to use for SLAM. Does it matter if the FC is slightly higher than recommended for your CYA level?

Realized I forgot to attach the picture. A few days after this the yellow residue got thicker and covered the walls and floor more fully

In the beginning we didn’t know what it was it and it was growing up sides of the pool and everywhere in the pool so we brushed and vacuumed and added 2lb of pool shock and it came back (see pic attached, got significantly worse a few days after the pic) After doing some research we realized...

Thank you for the quick reply! We actually have the TFPRO test kit and that’s where the results above come from does this change anything? Seems that the info in my signature isn’t coming up but we have a 20k gallon vinyl pool with an attached spa and a 48 sqft DE filter, and a Hayward...

Hi, We are new pool owners as we recently bought a house with a salt water pool and are struggling with maintenance as we learn abt pool care. We recently found this site and are hoping you can help. We definitely have a case of mustard algae and are trying to get rid of it. We started by...