Well the sand was messing up my ac110's. It is this fine sand from petco and I was getting sick of it getting everywhere and I could not for the life of me find pool filter sand locally so I used these pea pebbles I bought from lowes. They don't look bad but I miss the sand. The fish had a much easier time sifting through it and now NLS pellets they miss sit right in between the pebbles to rot. SMH. I am currently searching for places online that sell pool filter sand where shipping isn't outrageous. I figured ordering online would be about the same cost as driving there incorporating gas prices. Plus im lazy like that.