Small aquarium

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IndyJones

Adopt don't shop.
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Where do you think?
Fish make bubbles when they have low oxygen. Maybe try adding a bubble pump. Hope this helps!
My AquaClear makes lots of bubbles so do my plants. Speaking of, plants are another way to increase oxygen.

I personaly don't like the noise bubblers or sponge filters make, makes me have to pee.
 
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