While I was feeling this tank I had this giant gorgeous piece of Driftwood in there that I got a Craigslist for like I think like 30 or 40 bucks I thought the substrate alone would keep it down but I'm thinking it's more like teak bamboo or Cypress it's never going to build water is it because this thing was pushing against my hand probably about 4 or 5 lb of buoyancy so I got to figure out a way to tether this thing down like I said my new LED setup just almost went for a dip by the way thank you for everyone for helping me up to this point because I'm doing really well budget wise and knowledge wise with freshwater so thanks again Steve