I believe the second jar is to prevent the yeast mixture from getting in the tank...
I took out the second jar, and when reconnecting the airstone, it shattered. (Just one more hurdle on the way to fresh plant nirvana...)
So I tried this: took a 3/4 hard plastic (aquarium grade) tube, and stuck fine pore sponge/filter stuff in the end. Then took the tube from the yeast mixture, cut it and added a check valve. Took the tube after the check valve and put it in the plastic tube, submerged it, and stuck more sponge/ filter stuff at the top of the tube. I can see CO2 bubbles coming out of the tubing, and a small gas pocket at the top of the hard tube - trapped beneath the sponge/filter stuff. Ocasionally I see several bubbles get loose and zoom to the surface. Is the gas in that pocket diffusing into the water? That was my intention - to find a way to keep the gas in the water as long as possible...
Another thing - the check valve has been filling with the yeast solution. I have cleared it several times, even repositioned it to try to prevent any fluid from traveling that far in the tubing... Should I add a few more check valves? I don't see any fluid in the lines, so I don't know where this is coming from... I guess this is why there is a second bottle...
I took out the second jar, and when reconnecting the airstone, it shattered. (Just one more hurdle on the way to fresh plant nirvana...)
So I tried this: took a 3/4 hard plastic (aquarium grade) tube, and stuck fine pore sponge/filter stuff in the end. Then took the tube from the yeast mixture, cut it and added a check valve. Took the tube after the check valve and put it in the plastic tube, submerged it, and stuck more sponge/ filter stuff at the top of the tube. I can see CO2 bubbles coming out of the tubing, and a small gas pocket at the top of the hard tube - trapped beneath the sponge/filter stuff. Ocasionally I see several bubbles get loose and zoom to the surface. Is the gas in that pocket diffusing into the water? That was my intention - to find a way to keep the gas in the water as long as possible...
Another thing - the check valve has been filling with the yeast solution. I have cleared it several times, even repositioned it to try to prevent any fluid from traveling that far in the tubing... Should I add a few more check valves? I don't see any fluid in the lines, so I don't know where this is coming from... I guess this is why there is a second bottle...