Requesting reply from Aquatic-Store, et al.
I noticed Aquatic-Store's post concerning Eheims as a good CO2 reactor, and hope I can get an answer to my question. I just bought an Eheim 2213 Classic and set up a DIY yeast-based CO2 generator. I fed the CO2 airline to the basket on the Eheim's intake tube. My generator is producing LOTS of CO2 (1 bubble every two seconds, but that may slow down, of course). What is happening is that the CO2 gas is being trapped in the filter media that came with the Eheim, then every few minutes, the CO2 builds up enough that the canister has to release it, causing a rush of CO2 bubbles into the output tube/spray bar. I'm not sure that any of the CO2 is actually being dissolved, and I'm also concerned that this all-at-once release of the gas is going to damage the impeller. It certainly causes the Eheim to produce some noise.
Any and all input will be greatly appreciated, as this is my first aquarium in many years, and I'm trying to do this right the first time (but on a budget!)
Thank you,
CJ