When deciding on the type of spraybar I wanted (hose or hard acrylic tube), I got to thinking, I need to build up the substrate in the back of my tank, so there will be some sloping going on, so I figured the hose would do better. Hugs the curves better. I'm using a clear hose, and the twisting was not too difficult to work with. I have 3 suction cups, but 4 would be ideal (75g tank), or 1 every 10-12".
I was going to go to Home Depot to get my supplies, but I was dropping off a broken monitor and printer at a plastic supply place. I walked in and immediately knew I could get what I needed there! They had all kinds of plastic hoses & tubes of all colors, shapes, and sizes. They even threw in a free endcap! I told the the nice lady I was looking for a 16/22mm hose, and she was said "We only have inches here." lol

I asked for a 3/4" OD hose.
And yes, 1/2" ID hose will work for the RIO 600. Here's a pic of my setup. My RIO is not the RVT one; it came with a bunch of nifty attachments & one happened to have a venturi thing on it.
