Hi,
I had an inground pool put in 3+ yrs ago.
In ground vinyl liner 16x34
Pentair FNS plus 48 DE Filter
I have a chlorinator that I keep on a low to medium setting. I drop in liquid chlorine once every few days.
Current Chems: (taylor test kit)
FC: 5.5 - 6
TC > .5
PH 7.3 to 7.4
TA - 75-85
CH - 75-85
CYA 60-70 ** I know its a bit high, working on it.
Water is crystal clear and always has been. Never have a problem with cloudy water or algae in the pool. I brush the walls once per week. I use bioguard algeacide once per week.
I backwashed my filter a few days after July 15 and then again on July 29. Both times I took the actual filter out and hosed it down as well. I did notice a possible small tear on one of the filter sheets toward the bottom. The rest are in great condition.
Before the July 29 backwash through today I have noticed white streaks of dust on the pool floor. They seem to settle in the seams of the vinyl liner as well as slope/deep end. They are easily disturbed and kicked up. My dophine vacuum bot vacuums it up. When I clean the bot, it really looks like sand or something. My wife is very concerned that it is DE (she even made a forum post on a neighborhood facebook page and everyone said its a bad filter/DE coming into the pool). I am not convinced that it is, even with the small tear. I don't ever see anything other than water and bubbles coming from the returns. My FC remains high, my CC remains low. Everything else is great IMO.
Any thoughts as to what this white dust can be and how can I get rid of it permanently? As mentioned, Im using my vacuum bot to suck it up (Im not vaccing to the filter). And it appears every morning (I run the filter at night).
I had an inground pool put in 3+ yrs ago.
In ground vinyl liner 16x34
Pentair FNS plus 48 DE Filter
I have a chlorinator that I keep on a low to medium setting. I drop in liquid chlorine once every few days.
Current Chems: (taylor test kit)
FC: 5.5 - 6
TC > .5
PH 7.3 to 7.4
TA - 75-85
CH - 75-85
CYA 60-70 ** I know its a bit high, working on it.
Water is crystal clear and always has been. Never have a problem with cloudy water or algae in the pool. I brush the walls once per week. I use bioguard algeacide once per week.
I backwashed my filter a few days after July 15 and then again on July 29. Both times I took the actual filter out and hosed it down as well. I did notice a possible small tear on one of the filter sheets toward the bottom. The rest are in great condition.
Before the July 29 backwash through today I have noticed white streaks of dust on the pool floor. They seem to settle in the seams of the vinyl liner as well as slope/deep end. They are easily disturbed and kicked up. My dophine vacuum bot vacuums it up. When I clean the bot, it really looks like sand or something. My wife is very concerned that it is DE (she even made a forum post on a neighborhood facebook page and everyone said its a bad filter/DE coming into the pool). I am not convinced that it is, even with the small tear. I don't ever see anything other than water and bubbles coming from the returns. My FC remains high, my CC remains low. Everything else is great IMO.
Any thoughts as to what this white dust can be and how can I get rid of it permanently? As mentioned, Im using my vacuum bot to suck it up (Im not vaccing to the filter). And it appears every morning (I run the filter at night).