Thought I would post up some pics of a new pond i'm working on. It measures 8ftx6ftx4ft high. Internal water volume is around 1050 gallons. It was constructed of 3/4 inch plywood and 4x4s. The number of 4x4s was not needed for structural integrity, but a deck is being built around the pond and this was the best way for it to work out aesthetically down the road. I'm in the midst of putting together my filtration system which will be a very large k1 media fluidized bed. For mechanical, I plan to use several sets of filter socks. The main issue I am having right now is what to do about a substrate. I was originally set on sand but have since been convinced that a tile bottom with only a little bit of sand would probably be better, maintenance-wise. After several trips to Home Depot, I think I have picked a ceramic tile that suits me but am wondering if it's completely inert. I know basic fired ceramic is, but with all the glazings that are used how do i know if the tile is 100% safe? One pic is of my wild caught motoro she has around a 17-18 inch disc diameter, one pic is of a bd/leo i got from Darren at monsterfishbowl, he is now a little over 14 inches. Another picture is the front shot of the new build..excuse the mess..still in the middle of moving in/construction.