Bpb
New member
Bubble Scrubbing and the Red Bug Scourge
With a lime wood airstone the bubbles are so fine that the impeller doesn't really wobble or have to chop them up. What you're describing is what would happen like you said with a powerhead half out of the water, or if you put the airline with no diffuser directly into the pump intake. Then you would have large enough bubbles to create non-uniform impeller resistance and a wobble/churning sound as a result. The lime wood stone is what used to be used in air driven skimmers so the bubbles are very fine. Most the bigger ones go directly to the surface and the ultra fine ones you can really only adequately visualize if you put a light on the side of the tank, are the ones that make it up to the display. They can stay in suspension for hours they're so small and have virtually no buoyancy. The weight of the water and flow keeps them circulating a long time and the pumps should function normally without cavitation. If you cut flow and the tank goes stagnant you can watch the nano bubbles and they raise at an ultra slow rate of a few millimeters per second.
The process is pretty specific as originally outlined and takes all things into account, like pump cavitation and fish scaring.
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With a lime wood airstone the bubbles are so fine that the impeller doesn't really wobble or have to chop them up. What you're describing is what would happen like you said with a powerhead half out of the water, or if you put the airline with no diffuser directly into the pump intake. Then you would have large enough bubbles to create non-uniform impeller resistance and a wobble/churning sound as a result. The lime wood stone is what used to be used in air driven skimmers so the bubbles are very fine. Most the bigger ones go directly to the surface and the ultra fine ones you can really only adequately visualize if you put a light on the side of the tank, are the ones that make it up to the display. They can stay in suspension for hours they're so small and have virtually no buoyancy. The weight of the water and flow keeps them circulating a long time and the pumps should function normally without cavitation. If you cut flow and the tank goes stagnant you can watch the nano bubbles and they raise at an ultra slow rate of a few millimeters per second.
The process is pretty specific as originally outlined and takes all things into account, like pump cavitation and fish scaring.
Sent from my iPhone using Tapatalk Pro
