Overflow help

[benignoh]

Right now i got an external overflow on my 150g, and was thinking of changing it to an built in overflow. First where can I get and internal overflow that i can glue the glass w/ silicone, I cant drill the botton glass (temper) will the overflow work the same if the bulkhead is in the back glass?
benny

[Fat Man]

The over flow will work the same if it's in the back as opposed to the bottom. There used to be a sponser that sold internal overflows, but I can't recall the name. They are actually pretty easy to diy.