Thank you for the confirmation and the time you take to respond. Now, it seems to come off easy, but sanding the entire pool may not be practical. Is a no drain acid wash good for this situation? The plaster guy said keep the ph at 7.2 and use a sequestrent agent and brush with metal brush. It will take 2-3 months but should come off.
Your thoughts? Is adding the BeauTec worth it?
Your thoughts? Is adding the BeauTec worth it?