I wish I knew how to make a poll. If you do, please do so.
Years ago, I had three tanks and for the most part, I left the tops open and we paid for it with humidity in the house and it created some black (not mold, the other) yet when we go to one of our local reef/fish stores he leaves all his tanks with closed with glass lids and has no problems with gas exchange etc.... please list the others.
So which way do you go ?
Lids
No lids.
Years ago, I had three tanks and for the most part, I left the tops open and we paid for it with humidity in the house and it created some black (not mold, the other) yet when we go to one of our local reef/fish stores he leaves all his tanks with closed with glass lids and has no problems with gas exchange etc.... please list the others.
So which way do you go ?
Lids
No lids.