04-30-2008, 09:46 PM
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Originally Posted by sanil
Hello. Thanks for the response. I do have a protein skimmer runnign which i have forgot to mention. The reason i got the the eheim canister wet/dry was because it does everything that a regular wet/dry does. It suppose to promote the health and growth of nitrfying bacteria. I am wondering why i have the microbubbles forming.
Again thank you for the input.
The Eheim wet/dry will put bubbles into the tank. The canister pumps water to the tank emptying the canister most of the way, then gravity fills back up. As the water level increases in the canister, most of the air in the canister is pushed out thru the breather tube. The Float in the side cylinder rises. When it gets to the top of its compartment it triggers the pump to push all the water out again. There is still some air in it when the water is pushed back to the tank and it takes some of the air with it. Any other pumps or filters can suck in the bubbles and chop them up then spit the back to the tank as micro bubbles.
Depending on the water's surface tension (surface tension is created by high organic levels, oils, phenols, medications, etc, etc) most protein skimmers will dump microbubbles back into the aquarium.
You can pinpoint the source by turning off filters one by one until the microbubbles subside. try combinations of the filters and pumps.
for us to tell what is causing it we would need a good video (mpeg or avi) of the tank showing the filter outlets somewhat up close.