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					Originally Posted by theokie  So I have a 150 gallon (48x24x30) that is drilled for the traditional corner overflow.  I want to change it over to an internal coast to coast overflow so I need to decommission the two holes in the bottom of the aquarium.
 Whats the best way to do this, should I put in the bulkheads and then just use a threaded plug, or should I have a glass patch cut and silicon that over the holes?
 
 And if I go the glass route, should I go with the same thickness as the bottom of the tank, 1/2" in this case?
 
 Any words of wisdom would be greatly appreciated.
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 The glass patch would be the best option IMO, chances of the bulkhead leaking would be far greater than the patch.