Originally Posted by niko
Just to note here - the ugly plastic trim that we see on most tanks made here in the US does not serve any reinforsement purpose. It does not help the structural integrity at all. It is used because of 2 reasons:
- When assembling the tank it serves as a guide where to place the glass and holds it in place.
- Helps prevent bumps of bare glass edges during transportation.
I've heard that some tanks have bad edges under the trim. Basically it's a very sharp glass edge, unpolished and dangerous, or just ugly. Is that so?
I redid (disassembled and re-siliconed) a 30 gal. tank from Perfecto last month. The edges under the rims were definitely unpolished and dangerous. In their defense, they don't expect folks to ever be exposed to those edges, and those are the edges the glass has after cutting it.
After cutting myself the first time, I took some 600 grit emory paper (fine sandpaper) to all the sharp edges and polished (?) the edges. There are two terms used in the glass cutting biz for finishing the edges. One term just means taking the sharp edge off and the other term is for doing some more extensive shaping and smoothing. Anyone remember them?
Anyway, it cost me about 10 or 15 minutes but made the job much more pleasant and less dangerous.
I had to reseal the tank because the bottom mostly fell out of it. It started it drip leaking in one corner a few weeks earlier and while trying to make time to deal with it, I did a water change. Apparently filling the tank all the way up was a mistake because I came back to 15 out of 30 gallons on the (tile) floor.
Before anyone bashes Perfecto, this tank was purchased back in 1983 and spend about ten of the years since in a hot Texas attic.
Oh, on the topic at hand, I use a small (~1" wide) putty knife and carefully work it between the glass and the rim on both the inside and outside of the tank. This only adhesive where the glass edge actually meets the rim and that's usually pretty week. This a wiggle and pry and work around the tank until the rim comes off and hope that I don't break it too many times in the process. Anyone know a good place to buy replacement tank rims? They may be ugly, but they're handy for holding glass tops up on smaller tanks. I've done three 20s and the one 30 in the last couple of years with the putty knife method. More attic victims.
I think another method would be to separate the front and back panes from the rest of the tank with a razor blade and then (after using the putty knife method) see if you can slide the pane out of the rim at the top or bottom. But I haven't tried that idea.