At what size can you vent RD/ Midas?I have a group of 6 @2.5''-4''.I would say 2 definite males,the other 4 I'm not sure about .Can they be vented at this size?.
At 4" yes you can vent them, I myself have never tried to vent a 2" fish. Get a magnafying glass and take a look under the hood. All kidding around aside I never checked at that size so I don't know.