Determining if sand needs replaced

Homebrewale

Silver Supporter
Apr 21, 2020
1,289
Holly Springs, NC
Pool Size
22000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair iChlor 30
Since there was a different thread asking about sand filters, it triggered a question about my pool. I know sand should never need replacing unless someone gunked it up with clarifiers and floc. How can you tell if sand is gunked up? I just moved into a house with a pool that has a sand filter. The previous homeowner gave me all his potions he had left over including a half bottle of clarifier. Should I pop off the MPV to look at the sand? If so, do I look at wet sand or dry a handful first? Do I run the filter for a few weeks to see its filtering performance? Or as a preventative, just go ahead and change out the sand since I don't know what the previous owner dumped into his water?
 
Did u find any pool sand in the shed? If not u may wanna schedule a deep clean of the sand regardless & have some on hand to top things up if needed. Trust but verify u know…
p.s. is your signature your new pool?
 
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+1. The previous owners seemed to be on the ball, but who's to say they always were ? Or the owners before that if they weren't there for a long time.

Crack that bad boy open at your earliest convenience. You will know by eye/hand if it's dirty and cleanable, or no longer sand like and needs to be replaced.
 
Did u find any pool sand in the shed? If not u may wanna schedule a deep clean of the sand regardless & have some on hand to top things up if needed. Trust but verify u know…
p.s. is your signature your new pool?

Yes, it's my new pool. I replaced my signature last week. I'm familiar with sand filters because my last pool which I had built in 2006 has a sand filter. I deep cleaned it every year. I guess my question comes back to seeing some past posts where deep cleaning didn't get rid of the floc. I got bermuda grass that likes sand so it would be easy to dispose.
 
+1. The previous owners seemed to be on the ball, but who's to say they always were ? Or the owners before that if they weren't there for a long time.

Crack that bad boy open at your earliest convenience. You will know by eye/hand if it's dirty and cleanable, or no longer sand like and needs to be replaced.

Only one previous owner. I put 2020 in my signature because a neighbor said the previous owners built it during Covid. Only clue I have is one of the pieces of equipment has a September 2019 manufacture date on it. So the pool is only about 2 years old. How much damage can someone do in one year? Don't answer that question. I do know that the previous owner was using a pool service.
 
Only reason I'm bringing it up now instead of unpacking boxes is that I had to backflush yesterday. The SWG was not generating when the pump is running at 2000 rpm. After I backflushed, the SWG was back to generating. I can't tell how dirty the water was except the little bit passing through the sight glass since the baskflush piping is hardpiped into the ground. I still have a lot of stuff I need to learn about the new equipment and where things operate properly. I could run my old pool at 1400 rpm and still generate chlorine. When backflushing, I would just go to the end of the hose and look at the water coming out.
 
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