[klibs]

It doesn't matter as long as you are injecting enough CO2 into the water and there is enough flow throughout the tank to distribute the CO2 everywhere. I don't understand your concern about distributing the CO2 into the other filter (?)

 

[klibs]

Well that is kind of the question, though perhaps wrongly phrased. How does the flow and distribution of co2 go through the tank with the 2 filters?

As there will be an outlet on both the front and the back of the tank. All I am thinking of is if the co2 will get distributed evenly. The flow of the front outlet will, of course, lose some of its power by the time it reaches the outlet on the back. Does that mean that the 2nd filter picks up the flow of the first or will it create a "build up" zone of 2 competing flows where the co2 will get stuck?

Alternatively, am I just making this more difficult than it actually is? Am I placing the inlet and outlet on right places? This might seem rudimentary to some of the better, more experienced, scapers but it will be my first time working like this and I really just want to get it right.

Yeah as long as water is moving throughout all areas of the tank, so is your CO2. With 2 filters/intakes/output you can play around and see what works best for you. The only "wrong answer" is a setup that has dead spots where you don't have any flow. You might even have too much flow running both of those filters lol. You'll figure it out once you get up and running, definitely wouldn't stress it now