I need some advanced advice on eggcrate as a falsebottom. I would like to know if it's better to silicone pvc spacers to the bottom of the tank and lay eggcrate on top, or to just stack the eggcrate? - just silicone sheats together and silicone the bottom of the eggcrate to the bottom of the tank. I would be using a pvc pipe to siphon out water, and there wouldn't be any pump or filter under the falsebottom to worry about.