eBay has amazing prices of that tubing. I bought 50' for less than $50. The Home Depot stuff is sprinkler tubing and really weak/thin. The stuff I grabbed off eBay was specifically aquarium tubing but I think it's the same as pond tubing. eBay also has the clips you need secure the hose at way better prices than any LFS. I had luck at my local Lowes for the slip fittings that again are crazy expensive at an LFS.