CO2 injection - water clarifying properties?
So, I normally keep a CO2 cylinder around for homebrew dispensing...
I'm currently not using my CO2 for its normal use, so I decided to haul it up out of the basement and toy around with CO2 injection..
One thing that amazed me was after I had the CO2 running for 2 hours or so I walked by the tank and the water was considerably clearer than it had been before I started the CO2. Co2 levels were around 15-ish ppm, and it seems surprising that such a short run could clear up the water so much..
Is this normal? Does CO2 normally clarify stuff out of the water?
For the tinkering experiment, I got a cheap fluval mini diffuser disc (for an 88g system), cheap bubble counter, cheap check valve, cheap drop checker, a parker needle valve and adapters needed to hook onto my homebrew-standard 1/4" flare gas fittings. Minimal cost stuff to experiment with, but a decent needle valve.
I set the drop checker up with 2dKH, intending to target 15ppm or so of CO2 in my initial tinkering. I got the CO2 going at about 1.5 bps (meaningless in general I know) and turned off my airstones. This ended up turning the drop checker from a blueish shade to a darkish shade of green... I was probably a tad shy of 15ppm, but in the general neighborhood.