Hi, I'm interested to know what method of siliconing you use when you build a tank - do you use spacers and inject the silicone, or do you just apply the silicone to the bottom pane and then put the side panels on top of it?
I am no expert in this, there are members around here much more qualified to help, but this is the method i have used the few times I build DIY tanks:
I usually place some support glass on the bottom, long flat strips running parralel to the glass, leaving a step on the edge of the bottom pane. While all is still wet I place the panels onto the step, which has silicone on it. Use clamps or jigs to keep the side panels in place while it sets, i then silcone the side panels together, one edge at a time, allowing sufficient time for the silicone to set inbetween. You can also use support strips in the corners if you like, makes life easier and is overall strionger, but not as pretty.