Before you start shopping for a pool filter, you need to know the three types: Sand, DE (diatomaceous earth) and Cartridge. Each filter has their own pros and cons, which I’ll cover. How to Buy The Best Filter.
I next filled the planter with pool filter sand. I love using pool filter sand because it is inexpensive, clean, and very white. I use filter sand for filler in vases and displays like you can see here.