Spilled sand!! How much do I add back?

[Bqtk]

Title says it all.
I have a Janby SFTM22. While moving things around I knocked over and spilled a decent amount of sand. I need help determining how much new sand to add back. Everything I see online talks about the amount of sand to add to an empty filter, but mine isn't empty (more than half full of good sand already). are there typically any marks or lines on the filter that I can use to gauge?

Thanks in advance!

 

[ajw22]

All you can do is eyeball and estimate how much you lost. Jandy does not help you know the correct sand level.

 

[Bqtk]

All you can do is eyeball and estimate how much you lost. Jandy does not help you know the correct sand level.

Yikes....I have no idea. Didn't see the level before it spilled and I'm not a good eye baller....no objective meaures at all eh?

 

[Bqtk]

In that case....how big of a problem is it if I add the wrong amount? Obviously I can't be accurate now.

 

[ajw22]

I would error on underfillng versus over filling.

 

[splashpad]

In that case....how big of a problem is it if I add the wrong amount? Obviously I can't be accurate now.

The website manual shows it @ 250lbs if starting from empty. I wouldn't fill past the widest part that starts to narrow at the top, see how that runs.

 

[Bqtk]

The website manual shows it @ 250lbs if starting from empty. I wouldn't fill past the widest part that starts to narrow at the top, see how that runs.

Thanks! Followed both of your advice.

How do I gauge if I underfilled? Poor filtration? Some other functional measure?

 

[splashpad]

Thanks! Followed both of your advice.

How do I gauge if I underfilled? Poor filtration? Some other functional measure?

Water will flow extra hard (less resistance) and your pool won't "clear" as expected. I've seen posts of people actually hearing noises (churning or similar) when not enough sand inside

 

[Bqtk]

Water will flow extra hard (less resistance) and your pool won't "clear" as expected. I've seen posts of people actually hearing noises (churning or similar) when not enough sand inside

Thanks! Sound sand feels normal...pressure gauge is normal...looks like I'm in the clear.

Thanks for everyone's help. Love this forum.

 

[Bqtk]

So... I didn't remember to backwash and rinse the new sand. I ended up with a slot of fine sand on the floor and suspended on the surface making things really cloudy. Tried some clarifiers (don't think they were alum floc) which got rid of some of it. I remember having good luck with liquid alum floc last year, so I was going to pick some up, but I thought I would check tfp first. Didn't realize there was so much hate for floc.

I'm not using it for organic matter here, just super fine sand that's stubborn. Is that appropriate or is there a better solution?

 

[Bqtk]

In case your wondering if it truly is sand...

It appeared right after adding the new sand. Pool color is normal. It sticks to my hand and my hose and feels very sandy-grainy, not slimy.