All three at 1.5
The emergency will always be dry so no fish or snail would go down it. No algae to block it either.
It is best to put the drains in the middle, that way water from the overflow will be equal speed from the farthest point toward the drains and not cause turbulence or any slurping air effect.
The emergency will always be dry so no fish or snail would go down it. No algae to block it either.
It is best to put the drains in the middle, that way water from the overflow will be equal speed from the farthest point toward the drains and not cause turbulence or any slurping air effect.