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I started with a 1/2 gallon tank and realized I would need to clean it too often. So I just moved my male betta to a gallon tank which also came with a cover. I would like to use the cover for safety but it only has an airhole the size of a quarter or a little larger. I've been using it for 2 days, since I put him in there, and he has already started a nice bubble nest. Or is he rising to the surface more because he needs more oxygen? I'm just a little concerned I am not giving him enough air, but I really want to use the cover if he's okay with it. How can I tell? Thanks in advance!

Make sure there is about 1" of space between the cover and the top of the water. I'm not 100% sure how big a quarter is, but most coin-sized holes should provide OK airflow.
You really need the space to make sure you have a decent sized open surface area, as that is how the oxygen gets into the water.

A bubblenest is a good sign. If he starts just sulking at the surface or 'panting' or gasping constantly, then you have trouble, but I think he'll be fine Don't worry if he's just gulping air to make bubble after bubble, that is fine.

Is there a picture of your tank anywhere?
Do you have a little filter or airstone in there for him?

For animals, the entire universe has been neatly divided into things to (a) mate with, (b) eat, (c) run away from, and (d) rocks. - Terry Pratchett

If it a glass cover that fits into the tank and a corner has been cut I would say get the other corners cut as well.

I also would buy a small mini filter this will aerate the water.

Have a look in [link=My Profile] http://www.fishprofiles.com/forums/member.aspx?id=1935[/link] for my tank info

Look here for my
Betta 11Gal Desktop & Placidity 5ft Community Tank Photos

Keith

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