Ok so i would rather divide one tank then have two small 5 gallons.The thing is i can't figure out how long i need the glass for a standard 10.I need to divide one tank in half and the other one in half but long ways.how would i be able to get the glass in the tank to silicon when theres a rim permitting me.i'm using glass because i'm turning one 10 into a shrimp and one into a dwarf cray tank split long ways.Any ideas