About CO2, currently, I use a 2 litre clear plastic milk bottle half full of water, and I have never changed the water, I just add some yeast and sugar every day so there is always a froth on top. Reading your info, I think these alterations could be of benefit:
Change container to a lightproof one with a lid, connect a hose to the lid and run hose to top of cab so co2 is released at top of cab.
So you suggest adding rice and baking soda to the sugar and yeast? I've also read of adding fruit juice or fruit pieces.
My reasoning for placing my co2 bottle on the floor of the cab is that the open neck is then level with the medium and the open end of the cool tube at the other side of the cab draws the air and co2 across and upwards, there is a circulation fan at the opposite side of the cab to the bottle so i hoped I would get co2 swrling through my plants on it's way to the cool tube to be exhausted.
Change container to a lightproof one with a lid, connect a hose to the lid and run hose to top of cab so co2 is released at top of cab.
So you suggest adding rice and baking soda to the sugar and yeast? I've also read of adding fruit juice or fruit pieces.
My reasoning for placing my co2 bottle on the floor of the cab is that the open neck is then level with the medium and the open end of the cool tube at the other side of the cab draws the air and co2 across and upwards, there is a circulation fan at the opposite side of the cab to the bottle so i hoped I would get co2 swrling through my plants on it's way to the cool tube to be exhausted.