I was wondering what type of sand you all use? I have seen where people are saying that construction sand works fine. I am just a bit unsure of this. Is there a brand name of river sand/construction sand to use? I am going to need around 250 to 300lbs. of sand. i just cant see purchasing 300 lbs of carib cichlid sand at 15 bucks for 20lb. also if you know where I could get sand near Winchester Indiana that is suitable to use please let me know.