I am awaiting the arrival of our new 27x5' AG pool. It is coming with a generic 'sand' filter and a two speed Hayward pump. We have a 100K BTU nat gas heater and live northern Minnesota (in The Ice Box of the Nation). Being that we want to use this pool as many hours as possible in our short season, we will be lighting it for night use. Our existing pool (21x4') had a sand filter which did the job but I'd never invite guest to swim under the lights as the 'fines' clearly were visible even with adding DE regularly.
So, I am considering using glass beads/crushed glass and would like to hear from those who are using it or have used it. If you stopped using it please tell us how long ago as products have changed and supposedly improved... Vitro-Clean a major investment (another ~$300 with shipping) and no one within a days drive keeps it in stock...