it is actually an 'enclosed' air concept (if it is ever exist)...note that the aquarium is actually upsidedown...therefore there will be air exchange and the water surface below is agitated by the electric submersible water pump....the duo has actually failed to produce new leaves when it was kept with the others under the shed.....after 2 weeks trial, the condition improves tremendously and i sincerely share this with all of you. i actually working on another growing concept and it will soon be exposed here too....
all comments are welcome...