What kind of silicon to use for sump

Hey guys - I am in the process of building my 55 gallon sump in my basement. I have the glass panels cut and ready. What type of silicon do I need to have to seal the panels into the tank? What is the best way to set up the panels to get them to stay in place when applying the silicon?



What should I note when assembling the sump? Any words of advice/wisdom?