Pool filter sand appears to be recycled glass... could I still use it?

[PKPuffer]

is it a bad idea to use it? should have known it wasn’t real sand, very cheap. Don’t want to use anything that could hurt fish, seems to be quite dull but pretty sure it’s all or mostly glass.

 

[PKPuffer]

No opinions out there if this could be a suitable substrate?

 

[PYRU]

All I use is pool filter. Leslies has the best imo grain size, but the quikcrete stuff at HD works great to with finer particles.

I've had all kinds of fish on it. I have 2 puffers that bury themselves all the time in it. No issues.

The cut your fish up deal is an urban legend.

Leslie's is super white the quikcrete is tan

 

[PKPuffer]

All I use is pool filter. Leslies has the best imo grain size, but the quikcrete stuff at HD works great to with finer particles.

I've had all kinds of fish on it. I have 2 puffers that bury themselves all the time in it. No issues.

The cut your fish up deal is an urban legend.

Leslie's is super white the quikcrete is tan

Thanks!