Hi there. We have a very large pool that we recently gave an acid wash (muratic) to remove scale build up from bore water. The pool had no issues before this. Water very clear and nothing floating on top. We do however have a leak in our skimmer boxes, so we have been avoiding using them, but this was also the case before the acid wash, so no change there.
Since refilling the pool, about a month ago, we have found white floating subtance that firstly resembles talcom powder, but then clumps together to look a bit like torn up tissue. After time it becomes harder and the particles larger, so that if you dip your arm in it, it leaves white particles the size of tiny ants on your arm. The powder reacts to acid - it fizzes. When you pick up a clump and roll it between your fingers, it forms a thread like substance. (Will include photos) The particles sink to the bottom over time and form a heavy powder. We emptied the pool again, and scraped the powder off the bottom (which when left in a bucket, sets quite firm) and gave it another good clean as the scale reformed, but not so thickly. This time I cleaned the top end with vinegar and the bottom with a diluted muratic acid wash and scrubbed it well. We then gave it a good blast with a high pressure water cleaner, and rinsed well will water. We partly filled the pool last night and added chlorine. The pH is 7.4 to 7.6 and the floating substance is back....overnight! The photos were taken this morning. I hope you can help us as we are at our wits end.
Pool details:
Inground concrete pool, fully tiled
45 000 gallons
Sand filter
We use red phenol and DPD tablets to test
It is slightly hard bore water which is drinkable.
It was previously run on a salt water chlorinator, but currently using chlorine powder and tablets.
There are no water features or spas.
Since refilling the pool, about a month ago, we have found white floating subtance that firstly resembles talcom powder, but then clumps together to look a bit like torn up tissue. After time it becomes harder and the particles larger, so that if you dip your arm in it, it leaves white particles the size of tiny ants on your arm. The powder reacts to acid - it fizzes. When you pick up a clump and roll it between your fingers, it forms a thread like substance. (Will include photos) The particles sink to the bottom over time and form a heavy powder. We emptied the pool again, and scraped the powder off the bottom (which when left in a bucket, sets quite firm) and gave it another good clean as the scale reformed, but not so thickly. This time I cleaned the top end with vinegar and the bottom with a diluted muratic acid wash and scrubbed it well. We then gave it a good blast with a high pressure water cleaner, and rinsed well will water. We partly filled the pool last night and added chlorine. The pH is 7.4 to 7.6 and the floating substance is back....overnight! The photos were taken this morning. I hope you can help us as we are at our wits end.
Pool details:
Inground concrete pool, fully tiled
45 000 gallons
Sand filter
We use red phenol and DPD tablets to test
It is slightly hard bore water which is drinkable.
It was previously run on a salt water chlorinator, but currently using chlorine powder and tablets.
There are no water features or spas.
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That appears to be calcium. Do you fill from a well or is your local city water very hard? That could also explain why you had to do a drain and acid wash previously.
