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Airstone in HOB filter?


fauxfox
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the way you currently have it setup, it can pull air into the impeller and cause cavitation. Also popping bubbles will put gunk on your blinds. Typically the way an air stone is added is to drill a hole in the lid and feed the airline through it, and you'd have it in the media compartment. This is easier to do on other filters, but not impossible on that aquaclear. Also know that the airstone will clog a lot faster being that all the gunk will be run by it. 

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I'd be a little careful, and ask this question. How do you know it provides enough oxygen? I rarely meet people who test for dissolved oxygen. Most people would say, there aren't that many fish in that tank. The reality is, the oxygen is consumed by plants at night and bacteria much more than fish. So You'll find that a couple hours before lights come on, oxygen can be dangerously low. 

I would doubt that a HOB, wouldn't let the fish live, but enough oxygen  is a relative term. During forest fires, there is smoke in the air, and there is enough oxygen to breath, but long term it leads to problems. This happens in aquariums too, where oxygen can get depleted. This was my observations from doing all the testing I did with a DO meter. My conclusion was that an airstone even at super low flow provided essentially maxed out oxygen levels in our aquariums outside of extremes, like 1 airstone with slow flow to 10k gallons of water. 

 

This is the old video with bad audio and some lost footage as the testing took many many weeks with different setups. However the testing I did, in other fish rooms and my store it was a wake up call for me. I couldn't predict a single aquarium oxygen's level unless it had an air stone in it. In which cause I knew it would be high. 

Again, I think odds are for quite a while, your setup would be fine. However with a high plant load, and a water change where dechlorinator uses up oxygen, you could find your fish in a panic some random day way down the road.

 

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1 Airstone maxing oxygen in 10k gallons of water is unfathomable. 

I watched that video yesterday after finding out low dissolved oxygen may have caused my recent columnaris outbreak. 
I'm glad I posted here for help instead of reddit because i don't think there are many master horticulturalists on reddit.
I got the airstone way in there, on the sponge now, and no splashing. 

airstone_updated.jpg

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On 11/16/2020 at 6:46 PM, Cory said:

Should work pretty well. Also know that you can turn the pump down quite a bit on the oxygen as well. It doesn't take that much air to get lots into the water, if the air flow is any issue in the hob. 

I am looking into bleed valves now to lessen the flow so the stone won't get clogged as quickly and make too much noise.
Thanks for the follow ups and taking initiative to make my setup in tip top shape.

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