Okay this has been happening for a while now (at least a month). Directly after feeding the tank, the AIO section begins to produce thousands (maybe millions) of microbubbles for 1-2 hours then it stops. I have no idea why this is happening or what is causing it, but I feel like it’s probably the skimmer since everything remains underwater the whole time. It’s an IM 20 gallon AIO tank and I’m feeding LRS/Mysis, not a whole lot just enough for the fish and anemones