tank drilling

[TWINPEAKS]

I'm going to drill a 90 gal. tank I have and needed to know how you determine where to drill the holes,How far from the top etc.

 

[latazyo]

I "THINK" the rule is that the distance from the edge of the tank to the center of the hole should be equal to the diameter of the hole

so if you're drilling a 1" hole the edge of the hole should be no nearer than 1/2" from any edge of glass

one thing to think about in addition to that is the bulkhead, you dont want to have to cut a little piece of trim out to accomodate the bulkhead

so make sure the bulkhead and the hole fit without having to cut your trim