What size hole to drill?

[TotalPetsPlus]

What size hole saw do you need to drill
1 inch bulk head
3/4 bulk head'
i am looking to drill my own sump that i broke taking down to upgrade to a 150

 

[RedDevil.258]

3/4" requires a 35mm or 1 7/16" - 1 1/2 "glass bit
1" requires a 45mm or 1 3/4" glass bit

 

[RedDevil.258]

Diamond embedded glass bit.