White sand-like residue in my robot bag

[serge]

I have noticed recently a white, sand-like residue in the cleaner's bag. I let it dry and it is a fine dust resembling the white cement used in my plaster mix (SunStone). My numbers seem reasonably balanced (FC=6.0, TA=70, PH=7.4, CYA=70, Ca= 600 (it has always been this high), salt=3000. Could it be my plaster is "peeling off"?
Any ideas/suggestions are welcome

 

[Mike59]

I've always gotten the same stuff in my Robots bag and I have a vinyl liner, no plaster.
I figured it was just fine dirt or pollen. It'll be interesting to hear what others think.

 

[serge]

thanks...yeah, i've had some before, but recently it increased to fist full amounts...let's see if others have had the same

 

[bdex]

I have it. No idea what it is. we are vinyl liner, SWG and my ch is a little high from fill water. Always blamed gunk on high CH. Probably not correct.

 

[duraleigh]

A CH (not Ca) of 600+ would make me think it is calcium precipitation.

What is the CH of your fill water?

At what level do you keep your pH?

 

[bdex]

My ch is between 500 and 550 if I remember right (out traveling for work) and my ph is adjusted to 7.4 every Saturday with ma. But only tends to drift slightly between. My ch was much higher before I kicked the pool store to the curb and got a 2006 Taylor kit. Since then I have done all the vacuuming to waste (with the gunk on the bottom) and refilled with water that has passed thru the water softener.

 

[cody21]

We have a spray-on Fiberglass finish. I've always seen that fine 'grit' in our bag. I've always assumed it was just dust or fine debris that settled on the floor of the pool.

 

[bobby1017]

Possibly calcium flakes from the swg, I get the same thing.

 

[serge]

I discarded the possibility of being precipitated Calcium, as it won't dissolve in an acidic medium. I have 2 theories, one being the white cement of my plaster (not very likely) and 2 fine dust blown over from a nearby highway construction..My CH is 650 and PH ranges in the 7.4-7.8 with some 8.2 when acid not added at the normal 3-4/day/interval..I do get some Ca flakes in my hot tub when PH goes to he higher end on the range, but controlled very easily with acid.

 

[bdex]

I have a vinyl lined IG so the plaster thing is not my issue.


Sent from my iPhone using Tapatalk