Yes the color has nothing to do with anything. its a visual thing.. When I was installing irragation at MRC it was easier to see where you primed by looking at it, much better than the clear stuff, you did not want to mess up priming a 4" main only to have it blow under pressure 
Jim
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Setup: 180G DT, 105G Refuge (approx. 300lbs LR, 150lbs Aragonite)
Hardware: Super Reef Octopus SSS-3000, Tunze ATO, Mag 18 return, 3x MP40W, 2X Koralia 4's Wavemaker
Lighting: 5ft Hamilton Belize Sun (2x250W MH, Blue LEDs) Vertex Calcium Reactor 2x Deltec Pellet Reactors
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