Whats the best way to patch holes drilled in the bottom of a tank?

[ensquire]

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.

The glass patch would be the best option IMO, chances of the bulkhead leaking would be far greater than the patch.