Re: First time in a long time
The great stuff is actually very easy. Just fill the back wall with it and when it's dry get on some rubber gloves and silicone away. Use your gloved hand to spread the silicone into all the cracks (work in small sections at a time as it skins over quickly, I do about 10"X10" sections at a time). Throw on dry coco bedding (I pat it down with my un-siliconed hand), and when it drys stand it up and blow off the excess. Fill in any bare spots as needed.
EDIT: I forgot to add that you can silicone the side walls about 6" from the back forward. This is to hide the white great stuff when viewed from the side. Simply take a razor blade and score a line in the silicone outlining the g/s background and then razor from the front of the tank towards your score line to remove excess.