Thanks shyro77 that's a REALLY good idea. I'll head out right now and track some down. I have about 80% of the plumbing done and need to go pick up a few pieces. Do you know the manufacturer name or have a pic of the can?shyro77;4522126; said:Justin before your ready to secure your background, try out the black pond foam from lowes or jerrys. It states its completely safe for fish and plants. I just installed one in a 75 experimenting around and i dont think i will use silicone again when securing one into place. A little goes a long ways , and very easy to cut the excess off around the edges, sand doesnt stick to it very well so i just smeared a little silicone on the edges when it was dry and sprinkled sand on it to blend in. When that foam expands it turns the tank and BG into 1, lol. I think it was $12 and only needed half a can for a 4 footer, might even be cheaper then silicone. Hopefully someone will chime in if i am missing something with the foam?
. I went to jerrys down here and they had 2 types, but they dont have a online site. I looked online at lowes and there brand is tetra?
take that Oceanic! 
Saltwater tanks get nasty.. 
I am going to mount them a little high so the water flow comes through the bottom of the tower not the top. It will be better for mechanical. Since the 300 gallon is a dark tank, I was thinking about switching to black sand. Anyone have pics of a tank with a 3D background and black sand?? 
