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I use the bubblers, but you should use a check valve for the flow control, if it is too rough, they might get stressed, but I prefer that over the current of a filter sometimes, you can adjust it easier, I have one in each of my 3 gal tanks, and the fishy's don't mind at all, in fact one of my fish, when I have to shut it off, he stays at the bottom more, and when I turn it on, he goes right to the top and watches them..lol..it is soo cute:) Some fish don't like it tho, so just try and see how your fishy reacts..
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