i went ahead and drilled it out, and now it works great. Doesnt look as intense as the gif, so Ill use my other air pump as supplemental I guess. Did you guys keep the air flow restrictor on there?
ok ill try & explain some more, firstly what you see in .gif is in salt water, in fresh water it is the same you just dont see it, fill a tote with water add aquarium salt & put it in there & viola you see the bubbles
some bits from some of my other posts......
ok heres what i found out on those, been reading up on them for a while as you know, well those do generate some D O, but the ones i prefered had an airline attachment at the bottom & brought it right into the impeller itself so infusing it with the recurculation the bilge pump is performing and by doing so realy produced the D O we crave. The fast-moving water at the output of the pump creates a vacuum, which suck air into the pump output. This system typically provides larger amounts of smaller air bubbles than previously discussed aerators,
ok i just read this again, it's not an aerator, this is an oxygenator, its a recurculating bilge pump, it has a clever impeller design that produces millions of microscopic bubbles, totaly silent, vibration free & externaly mounted, the "keepalive" brand has a barb at the bottom to attach an air line, that way you could in theory add portable oxygen tank, but we just attach a small air pump & viola, millions & millions of minature air bubbles, show me ANY airstone & pump combination that beats that, i chose the external mounted for ease & to diffuse the bubbles away & not directly at the delicate roots, but now my crazy head got the idea of a small thermostaticly controled freezer for reservoir, this way mount an internall pump at the bottom, cheaper pump too & more options in size, if you need the details, ask away
some of the conversations on this item & subject on flows thread, this page ....
https://www.rollitup.org/dwc-bubbleponics/366114-official-dwc-cooler-club-any-5.html
hope this helps you understand the reasoning why i got this all started in the first place
peace