Moving soon and planning on upgrading to a 265 reef. Pretty sure I'm gonna go bare bottom and have a remote sand bed. The tank is 30" high and I plan on having the rock work go almost to the top in spots. So my question is what's the best material to put on the bottom of tank for some added protection from a boulder falling on to the bare bottom and turning a dream into a nightmare? I was thinkin of a piece of 3/16 plexi from the depot cause it's safe to put in the tank. Any suggestions?