Thanks, I used 100% GE-1 silicone. I cut all of the old silicone out with a razor knife, and then went back with a flat razor blade and scraped all the seams down to make sure that there was no residue or silicone left. Then i wiped it all down with a vinegar solution to make sure no oils were on the glass before sealing. I taped off my verticle seams so that I would have straight lines and went to town with the caulk gun. I used 2 tubes for my 150. I layed on thick lines, and then went back with a nylon angled tool (you can use your finger) and smoothed out all the seams. I used the tool because I wanted a larger spread than my finger would have made. Once you start you can't stop until it is done, and you have to do the whole tank, no patch jobs.
Then I let it sit for 6 days to cure (Probably should have let it sit another day or too, but got impatient). I used a razor blade to clean up the few spots where I dripped silicone on the tank bottom. Then I started filling it. 20ish gallons at a time. Let it sit for a day, then 20 more. Once completely filled it sat for a week, no water loss. Drained it down, inspected all the seals, then filled it up once again and let it sit for another week.
Hope that helps!
