Is this just sand or is it CYA

[robbegginer]

The prior owner left us with a bunch of chemicals, and I've used granular shock and pucks. We're getting a new liner, new water, and going with SWCG. So I opened up an old tub of CYA, but it looks like sand to me. Is this what CYA is supposed to look like?

 

[AK-]

the picture is not very clear but from what I can see that doesn’t look like CYA.

 

[AK-]

This is granular CYA (it can be more powdery)

 

[AK-]

One thing you can do is to get a large bucket and dissolve a little bit of it and test the CYA…
1/16oz of stabilizer should add almost 100ppm of CYA to 5gal of water. If you have precision metric scale than 1g of stabilizer in 5gal adds about 50ppm of CYA.

 

[PoolStored]

My guess is sand. Put some in a bucket with water, let it sit and swirl it around every so often. If it dissolves, it certainly is a chemical. If not, it is likely sand.

 

[Oly]

You have a sand filter, looks like sand in a CYA bucket.

 

[Orion7319]

I would try to find a way to dispose of it properly. If your local recycle center has a hazardous chemical disposal area I would take it there. It looks like sand, but it’s not safe to assume anything when dealing with mislabeled pool chemicals of unknown origin.