Help with new 190 gal build

[FishyFishy!]

For the drain, go with a minimum of two drains (herbie) and one return. 3 total would do just fine. I would suggest 2 x 1.5" drains and 1 x 1" return hole. You could go fancy with 2 returns as well (4 total holes).

It all really depends on the size, location and style of your overflow. Have any design pictures of the tank?