Hey guys I have a 10 gallon FW and I really dont like the gravel i have in there. I was looking at some possible substrates and I found that alot of people like pool filter sand. I like the look of it and how it wont do anything to my water/filter. I was just wondering whats your opinion on PFS. Also I already have fish in the tank (guppies and neons) so I was just wondering if I could put it in then put them back in? 
