1/2" ID (5/8" OD) Flexible BLACK Tubing, per foot

This black tubing works great for any add on equipment to your sump. It blocks any light which greatly reduces the chance of algae growth inside the tube. Therefore it's less maintenance.

When I bought my new set up, I picked up some of this black tubing as I wanted to run not only my ATO but also a couple of dosing pumps and being set up on an all in one tank I just felt that the black tubing would blend in better. While after everything was said and done, I decided not to run the dosers, I am still glad that I purchased the line to run my ATO as it does blens in a lot better than regular tubing which makes everything look nicer.