https://www.instructables.com/CO2-mixer-for-planted-aquarium/
CO2 Mixer for Planted Aquarium : 6 Steps - Instructables
CO2 Mixer for Planted Aquarium: I thought about effective CO2 mixing for a long time. I've tested almost everything: diffuser made from wood, air stone, glass...
co2 mixerplanted aquarium6 stepsinstructables