Have most of the parts already. Last thing to sort out is how to get the CO2 inside. Don't like the idea of just pulling the aquarium tubing through a smaller hole. You don't have a pic of how you got the CO2 line inside. Got some of these on the way Stainless Steel Fish Tank Air Flow Control Lever Pump Valve 3pcs | eBay Was thinking of tapping this into the side to deliver the CO2 inside. Where's sam's irrigation shop. Got bigger holders (63mm) but looking for 50mm holders.