running t5 lights and algea

[JDigital]

Originally Posted by matix

Currently using RO water from safeway from a culligan refill water station. Any reason to question the quality of the ro water?

Yup... read quite a few things that culligan isn't as pure as it could be, lots of times the RO membranes aren't changed out as often as they should be. I've read many people take TDS readings and getting readings that are not 0. Might want to test your next bottle.

[Myka]

I was getting RO water from Save On and when I tested it ranged from 8-15 ppm.

I agree you need to look at nutrient load - phosphates and nitrates primarily. Hair algae doesn't need much light to grow.