Bubbles in tank

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Aylana

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Joined
Dec 27, 2004
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Location
Newcastle upon Tyne
I went to bed last night and my tank was the same as ever, I got up this morning and there are bubbles all over the top of my tank. In the corner opposite it looked like a bubblenest that a betta makes. However I don't have a Betta to have done this. I currently have 6 copper rasboras and 3 black khuli loaches. I haven't added any chemicals or medications to the tank, pH is 7.2, nitrate is 20 (due a water change tomorrow) ammonia and nitrite are 0. I may have been overfeeding slightly to make sure my new khulies get some food, but even when I cycled with fishfood I didn't get bubbles like this! I'm stumped. Any ideas anyone?

:/
 
What do you have for aeration in your tank?
Could it just be the bubbles from that collecting over in the corner?
 
My filter (fluval 2) provides all the aeration necessary for my tank. I have no airstones or anything like that. I suppose it could be the filter although it has never had this effect before and the filter flow is now slowly pulling all the bubbles apart.

I think my tank is just weird, :S
 

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