Day two of general cure treatment. The cories and swordtail have more appetite, but some of the smaller cories sit around breathing hard, and Fabio is back to hanging out at the surface near the filter outflow again. The medication lowers oxygen content in the water. I don't have another air pump- both my spares are running this filter until I can get a larger one to do the job solo. But I do have lots of airline, splitters, connectors and flow control valves.