Well I learned that trial and error coupled with indecision can be expensive. I bought everything I needed (valves, barb fittings, etc...) to do this with soft tubing but I have since abandoned this designs and finally have ended up going with PVC
pipe. I bought 3/4" thin walled PVC
pipe (schedule 22.5 I think) that follows the rim of my tank, 90 degrees elbows around the back following the rim still, another 90 degree turns the pipe to vertical. Then I have it connect to a 3/4" valve, then a T reduction fitting with 1/2" on the perpendicular side. The 3/4" side of the T follows vertically down to a threaded fitting where I will screw a barb fitting into to connect my filter hose. The 1/2" then has a 90 degree bend to another 1/2" valve. There are two of these entire setups, one for inlet, one for outlet. It is a little confusing to follow this in words so I will post pictures as soon as possible. I will also try to explain better how I plan on using this plumbing system. I designed it so I could easily tap into the system in the future if for instance I want to add a chiller, or if I go reef with my nano cube I can easily do the whole fuge route.
I have cemented all the PVC
fittings together and then sanded everything with 400 grit sand paper. This is so that the paint will adhere to it. I used rustoleum plastic paint which is supposed to have a "hammered metal" finish. I used grey hammered metal and it matches my nano cube pretty well. The entire setup has been spray painted and is hanging up to dry. I still haven't figured out what I want to do inside the tank (intake screen and spray bar) but when I do I also have black Krylon fusion which is aquarium safe (and reef safe).
I am going to mount the entire thing with these little sticky mount pads that have holes in them to zip tie to. It should look pretty slick when done.
It is kind of sad though, I could have done this so cheaply had I know what I wanted to do from the beginning (and wasting probably around $50 or more on valves, fittings, and tubing that I didn't use). The PVC
method was actually very cheap.
10 ft of 3/4" thin walled was about $1-$2
10 ft of 1/2" thin walled was about $1-$2
fittings and valves from Home Depot - $10-$15
Krylon and Rustoluem paint - $9
It is sooooo much cheaper and soooo much easier to go to home depot than being plumbing from aquarium dealers. I am so kicking myself for paying double (or even triple) for stuff I didn't even use!
Anyway, I will post pictures as soon as possible.