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I have a 10 gallon hex tank. There have been bubbles on top of the water for the last few days. Small bubbles, almost like soap would make. Also, at a certain angle I can see some colors on top of the water. Almost smilar to an oil slick, but very faint.

I have one Beta fish in the tank. I am doing a 10% water change this evening.

hey the beta made the bubbles i think its a nest ive only had my betta a few months also i had the same oil skim in my 2.5 gal batta tank it came with a internal filter i replaced it wit a small sponge filter it does alot better and oil film is gone hope this helped

Hey, I just read that about Male Betta fish. Guess he's looking for a female. I have a Top Fin 10 filter. what is a sponge filter??

hey i have a homemade sponge filter i got some air tubing bought a small natural sponge at dollar store cut a small hole ran tubing thru got a small air pump i reall don,t know if this is the correct way but my tank stays clean with little water movement cause my betta likes it slow and easy

Hi,
The "oil slick" you see is a build up of organics and
caused by the type of fish food you are using. You can
eliminate it by changing foods, using an airstone, or you
can lay a paper towel on the surface letting it soak up
the surface scum and then discarding it.

In that kind of water, when the betta exchanges the used
"bubble" of air for a fresh gulp, the bubble will remain
because of the oils in the water.

Or

If you have a cluster of bubbles in one spot, then the
betta is building a bubble nest and each bubble is coated
with a "glue" from the fish that makes the bubbles last
longer and stick together.

Frank


-->>> The Confidence of Amateurs, is the Envy of Professionals <<<--

When is the last time you changed the carbon insert in your filter ?

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