How do I know I need to change my pool sand? My water (because of TFP) is crystal clear, cant get any clearer and balanced to what I have it. I have lived here for 3 years and I have never changed the sand. Just wanted some info.
Well, if sun has expanded and it's beginning to boil the oceans then it's probably a good time to give it a check.
Just a little joke. Sand doesn't need to be routinely changed, that practice was put in place because of all the junk pool stores sell that could potentially build up and cause filtering problems. It's also a good thing for pool stores to keep in their pockets during the "throwing everything at the wall and see what sticks" portion of trying to clear a green pool. Since you're following TFP I can assume no floc or random mystery goo has made its way in to your filter, so the sand should be as pristine as the day you put it in. There is a process for deep cleaning the sand, but if it is doing its job then no reason to fix what isn't broken.
When your sand filter falls apart and you need a new one.
The original sand that was in my 25-year old filter was still fine when the filter finally needed a part that was no longer available, but I changed it out anyway as it was easier to put in new sand.
A good deep clean will help older sand to work, freshen it up, remove channels, etc. Keep the FLOC and gummy clarifiers out of the pool and your sand will stay cleaner longer.
This post will walk you through the anatomy of a sand filter, and then provide a video at the end for how to deep clean your sand filter. The filter used in the photos and videos is a Hayward S180T top mount sand filter. The images are of a similar filter. Obviously not all filters are...
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