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Originally Posted by ColinAnderson
This is a point that is up for debate (and was actually debated in the original thread). Honestly, it depends on the reactor. OBSERVE and see what works. There are many on this forum that think it tends to work better being injected from the top (I subscribe to this theory as well). Likewise, there are many here that think it tends to work better lower down on the reactor.
But, it really depends on any number of variables, primarily the amount of flow you have going through the reactor vs. the reactor type and size. Which is why it varies by reactor. 
Whew. (I think I typed that holding my breath)!  |
That's one of the key points I've noticed with my setup. I run my external reactor on my XP3 outflow and if its too strong the co2 shoots out of the reactor...through the uv...and out the tank without being dissolved. If I reduce the flow to about 2/3 and tilt the reactor then all of its is dissolved. Oh, I have my CO2 enter from the top of the reactor to prevent it from being pushed out by the water flow.