Speaking of CO2 I just switched to one of AFA's high pressure reactors and wow does it inject a fine mist of bubbles into the tank now that don't make it to the surface at all. Alot better than my glass one.
Those are cool but they haven't lasted long for me much. They keep breaking seals on me which waste alot of CO2.
Tank looks sick Nick! Do you ever have issues with excel for algae and your crypts?
If you OD too much, the crypts will start melting starting at the petioles. I've been spot dosing most of the time after intense cleanings if algae appears. Got rid of all my staghorn and BBA that way. Cut away all infected leaves because they're already dead. This promotes new growth and soon enough, the plant will regrow new leaves.