I just ordered a new XP3 to add to my 90. I currently have a fluval 304, emporer 280, and AC 300. I will be removing the 2 HOB's and want to plumb both canisters so that I have a spreader bar at the top and intakes at the bottom that runs the full length of the tank. I want to do this using the white PVC piping but I want to paint the tubing to make it less noticeable. What kind of paint can I use for this job?