What looks the best, IMO, is Stealth tubing:
http://www.petdiscounters.com/Stealth-Tubing--25-feet_p_9233.html
But they don't sell it in 50 foot pieces, 25' only. I do believe they sell drinking water safe black tubing at Lowe's/HD though, by the foot.
Of course, if you don't have a background...the black tubing would really stand out
But if you have black silicone, and you're careful, you can run it right along the seam and make it almost invisible.
http://www.petdiscounters.com/Stealth-Tubing--25-feet_p_9233.html
But they don't sell it in 50 foot pieces, 25' only. I do believe they sell drinking water safe black tubing at Lowe's/HD though, by the foot.
Of course, if you don't have a background...the black tubing would really stand out
