Quote Originally Posted by Zandor
You can also use it when you have nutrient problems like a lock out or similar problem.
If i did have a nute lockout, how long would i let it run in my res before i replace with fresh water and nutes?

And GH recommends using at least once a month, let run for 1 to 2 hours, drain and replenish. Zandor, what do you think?

puff