Need help with CO2
For the last week I've been struggling to figure out what the heck has happened with my CO2 levels.
Last weekend I did some aquascaping, added some cholla drift wood, and cleaned my AC HoB. Previous to that I was having no issues with getting my drop checker to show up a nice lime green and my pH meter showing a 1+ pH drop. I was doing so by running the CO2 line into the HoB and effectively using it as a reactor. This has worked great for months.
Now, post scaping, the CO2 levels aren't where they should be. My drop checker turns a light blue and my pH controller shows the pH drop stalling out 0.3-0.4 short of where it used to go. Also, I'm just starting to see some light BBA growth popping up. I had BBA before when I had lower levels of CO2. After I got the levels up it went away. So the fact it's coming back seems to indicate the CO2 levels are indeed too low.
This last weekend I tried several things. I repeatedly changed the orientation of the CO2 tube in the HoB; I changed out the diffuser at the end of the tube to make sure I was getting finer bubbles to start; I cranked up the bubble rate; I even tried running the CO2 into a wave maker placed at the bottom of the tank to diffuse it that way.
Nothing made any difference! I'm at a complete loss now as to how my CO2 injection went from working great to being terrible as a result of some scaping and filter cleaning. And I have no idea what to do except considering scrapping the HoB and going with a cannister and inline reactor. I've avoided doing that thus far mostly because the tank is upstairs and I have nightmares about leaks. I like the simplicity of the HoB, but if I can't get this fixed then I don't know what else to do.