AFAIK you could introduce mosses (Vesicularia and the likes) instead of higher plants, they're not as CO2 dependent. Every aquarium tutorial I ever read tells m

AFAIK you could introduce mosses (Vesicularia and the likes) instead of higher plants, they're not as CO2 dependent. Every aquarium tutorial I ever read tells me that air pumps lower the CO2 content and you need injection as you explain.