the sand hasn't been in the filter for almost 3 months, and it's been out in the sun for all that time, our pool is a shocker and we very rarely take good care of it...
note to self: use chemicals if you don't want a green pool!!
I think i might give it a go, it's going to go into a empty tank so maybe i will give it a mightly clean, bake it in the sun then put it into the.
Try it with a few neons etc and lots of water changes and see how it goes.