I use that same type of hose, but in 1 inch, when I plumbed my 135. It's relatively cheap, flexible, easy to work with, durable and available at most Home Depots. I did a similar thing except I used a T to push the CO2 into my return before my UV (Tom Barr has a thread on this). I get good saturation plus misting of small bubbles in my tank. I can drop my CO2 a full point in 45 minutes with a bps of 4-5.
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