Rex Grigg CO2 reactor - Eheim 2217
I'm going to build a Rex reactor with my Eheim 2217. I have one question I hope someone can answer. What size hose barb do people use for the top and bottom? I assume that the barbs would have to fit the hose size for the return line but being at work I can't measure the tubing. Hoping someone can let me know so I can swing by Lowe's on my way home from work. Thanks!