Hello all. Thanks for the great forum. I’ve learned a lot from you. Hope I can get some insight into my new finding this morning.
I have a gunite pool that is 15 yrs old. I found my return jets are all discolored in black stuff. They appear as if they were burned. My pool chemistry has been great all season long. Did not have yellow/green algae at all. Using a brush does not removed it. There is no other place in the pool that has those discoloration.
Any help is greatly appreciated
I have a gunite pool that is 15 yrs old. I found my return jets are all discolored in black stuff. They appear as if they were burned. My pool chemistry has been great all season long. Did not have yellow/green algae at all. Using a brush does not removed it. There is no other place in the pool that has those discoloration.
Any help is greatly appreciated
Are you saying that this seemed to happen overnight? Or was this a gradual change? Your Poolmath logs don't seem to be updated. Can you post a full set of water test results please? Besides the chlorine/bleach and acid, have you added any other products to the water this season?