Airpocket in the DIY reactor
I just finished installing a simple DIY reactor made out of a 12 inch long (1.5 inch diameter) plastic vacuum tube powered by a small pump which pumps in water from top to bottom. The CO2 outlet tube is drilled in about 4 inches from the top of the tube. At the bottom of the tube, I squeezed in about 3 inches of filter floss. I have placed the reactor diagonally on the side glass & the outflow (the bottom of the reactor) is pointed towards the intake of the filter so the dissolved CO2 gets sucked up by the filter & spreads around the tank through the outflow.
So I put the reactor to work and immediately noticed an air pocket forming on the top the reactor. As I increased the bps rate, the air pocket got bigger as well. So I turned it back down to 3 bps and it got smaller. Even after, I shut down the CO2 the air pocket was still there.
I did some reading & some people suggested to use a more powerful powerhead but the downside is that theyre too nosiy. So all these brings me down to two questions:
1. What's the air pocket inside of the reactor made up? CO2 or O2? If it's
made out of O2 then why the air pocket gets larger as I up the CO2
2. Can I just go on living with the air pocket inside of the reactor? Is the
CO2 still being dissolved? I don't see any bubbles coming out of the
reactor. So if the airpocket isn't doing any harm, then I don't mind it
Obviously, I could wrong on this and that's why I need your insight.