Ok, potential medium/long post with details on my experience (so far) with a recirculating CO2 scrubber. I was burning media up in 4-9 days, and even buying bulk it was forecasted to get spendy. Started researching, and pulled the trigger on a setup I liked. I will say, I was entirely adamant about NOT doing it this way, and was convinced that a piece on TOP of the skimmer lid was the only way to safely do it. But here I am, doing it the way I didn’t want to, to no ill effects just yet, except frustration and ineffectiveness. I bought the FishOfHex adapter, plus a collection bottle and appropriate adapter for that. I also run an optical skimmer cup level sensor in case skimmate gets too high, it won’t overflow into the scrubber.
I tried to get it working, set it up, and seemed to be all good. About 1/4 of the media had already changed pink, then the media turned white, and got me looking around. Moisture, lots of it. Media got too dang and rendered essentially useless, lost its ability to color change, and also too damp to absorb OC2. My PH chart started a downward trend. I was originally using the BRS scrubber, then tried my Bashsea reactor. Both had way too much moisture, and dumped a lot of media.
I saw some people using a larger moisture collection cup, so I thought to use the BRS canister as the cup, and use the Bashsea reactor as the scrubber. I also thought that the warm air condensing could use some surface to attach to, and thought to toss a handful of straws in the collection canister to allow this and let the water just drip it’s way down. We will see how things go.
This has been an ongoing experiment since the 17th, so my PH chart has reflected all of these attempts. I just tried the new method last night and PH hovered around 8.25, which is higher than the 8.1-8.2 it had been at. I do have to say, I used to Joes Juice to kill some aiptasia last night, and had a PH spike due to it being Calcium Hydroxide, but I believe that boost would have burned off by surface gas exchange over a few hours.
I’ve attached a few pics. Original setup, then newest setup, and finally my PH chart over the past 10 days. Would love some input, comments, questions, suggestions, general discussion on this. CO2 mitigation is a hot topic and would love to improve this in my tank…