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Thanks. When you mentioned pressure wash, I assumed you meant with a drained pool. And yes, I realize some of the marking is staining, not black algae.

So do you suggest moving straight to emptying the pool and pressure washing for the black algae? Without acid. Or continue to give it a few days with elevated chlorine to see if it goes away first? The client has finally purchased a new salt cell so that will be available shortly. I just don’t...

All, looking for some feedback here. I’m a new owner of a pool maintenance company so still coming up to speed on everything. I do have a couple fairly experienced techs, but they don't seem to adhere to TFP methods much. Have a client with what appears to be black algae. Have read up on it in...

As an update, green color has dissipated. So SLAM worked over a period of about 48 hours.

Awesome. Thank you so much. So if I want to target a delta of 20 ppm bromine, I’d calculate how much chlorine is needed to add ~9 ppm chlorine. It’s a small pool, 5000 gallons, and they filled it about 18 months ago and are using the bromo bright tablets. I suspect it regularly goes stretches...

Thank you. One other bromine related question - so I understand chlorine or other shock reactivates bromide into bromine. But when dealing with liquid chlorine specifically, and SLAM, I.e targeting 20 ppm bromine, can you essentially calculate chlorine required via pool math or Orenda app and...

Have a client that has a small bromine therapeutic pool (5000 gallons). It has a green discoloration. I'm new to bromine, but have spent a couple hours researching it on this forum today. Seems like the recommendation is to "SLAM" it as you would a chlorine pool, just trying to target the right...