Help!! Our in ground gunite plaster pool. It is 9 years old. It is using the salt water system which we love. Work great water is always up to par we check it daily and then once a week take to the local pool store. The one we take the water to is a respectable pool place. But have a question for you. We will not have any one in the pool, for a week or so. Then we will get in and the is white dust thick on bottom. Not quite sure what this is. Thank you for listening please get back with us, as soon as possible with some answers for our problem. Thank you and may God Bless you for helping others, all of our level are perfect. Thank you.

It is called silt and is a combination of wind-blown dust and debris and, possibly some dead algae and plaster dust. When the pool is in use, all this gets stirred up and is mostly filtered out. It doesn’t have a chance to accumulate. If the pool is not used, for a week, it tends to accumulate and cloud the water after it is agitated by swimmers. Vacuuming, first thing in the AM, should help. Adding The Pool Circulators will dramatically improve circulation and help reduce the volume of sediments.  I hope that the information provided was helpful.