Tank building advice needed

[Clown]

Hey
I have now completed two ONe Was About 12 Gallons
My new one im puting into actiong today Is About A 20 Gallon
All i can say is make sure the glass is clen and dry And Use More then enough
Sillicon
And Apply pressur (i use Tape just keep check it the glass has moved ever 10 min)
Btw If You Can Find It I Would TRy and get black sillicon It Just Looks Better