I have a clear reactor and there's no surface film, you just have to have enough flow which can take some dialing in. Too much flow and you might fill the whole tube with water instead of a water and a pocket of co2.
I do have a light coat of brown algae or maybe it's a abcterial build up on the bottom half of the reactor though but that's probably due to me screwing up and leaving the reactor pump running while cleaning the sump lol
I dont have any splashing sounds in the horizontal reactor with my inlet and outlet coming and going from the side.
I can see how you can get a splashing sound if you have the inlet at the top and a flushing sound if you have the outlet at the bottom of the reactor though.
As for worrying about the build up of gasses, there's always the option of just attaching an airline tube at the outlet side and if you want to automate it just slap a solenoid on it. Personally I never saw the need to do that in a horizontal reactor.
I do have a light coat of brown algae or maybe it's a abcterial build up on the bottom half of the reactor though but that's probably due to me screwing up and leaving the reactor pump running while cleaning the sump lol
I dont have any splashing sounds in the horizontal reactor with my inlet and outlet coming and going from the side.

I can see how you can get a splashing sound if you have the inlet at the top and a flushing sound if you have the outlet at the bottom of the reactor though.
As for worrying about the build up of gasses, there's always the option of just attaching an airline tube at the outlet side and if you want to automate it just slap a solenoid on it. Personally I never saw the need to do that in a horizontal reactor.
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