Microbubbles

Ladies and gentlemen, we have microbubbles. And turbulence. Hence the microbubbles.

The fish seem to be congregating around them. I removed the airstone, which they never seemed to feel particularly strongly about either way. But they do like this particularly oxygenated new area. This morning I'm switching back to the output jet thing to see which they prefer. All of my tetras are river fish who appreciate some current.

I'm itching to get rid of this HOB filter and silence the noise. My choices are to 1) Run both for a month until BB builds up in the canister, 2) Take the media from the HOB and put it into the canister, or 3) Do both.

Taking chances in aquatics often results in disaster. I shall take option 3. Perhaps then I can ditch the HOB that much sooner.