If you have the Tetra Whisper 3i model, they tend to do that. I've hard the worst luck with them. I've tried them everywhere, they always end up detaching/toppling over and start bubbling and they don't ever work as intended. I threw them away, sadly, instead of returning them to the store. I still have the air pumps they come with so it wasn't a total waste of money. If you really want something that will work try getting a Tetra Whisper 10I, the one advertised for 10 gallons. I've had an awesome experience with mine and my betta loves it. :) You can adjust the flow if you think it's too much by placing a sponge at the fountain. My betta loves swimming under the fountain and it aerates the tank, too! No more bubble stone needed. :) It is a great buy and it is sold at Wal-Mart if you can make a trip to one, way worth the money.
Just my two cents. :)
One(1) male Betta splendens named Texas, one(1) big heart for him.
Texas means Friend, and that's what my betta is.
A new member joins the family, Takoda.
Two new members join the family.
Last edited by limeslide; 06-16-2011 at 11:36 PM.