Quote Originally Posted by NwoodE
I'm doing 2 5 gal DWC hydros right now. I started with 4 but 2 were male. I can't always attend my grow and go longer then 7-10 nutrient change. I will usually add an equal ratio of ph water + nutrient amount to fill back up.

This has worked fine for me. I would recommend the 7-10 day change if u can do it. I am physically unable to due to security concerns at my location.
Nature will find a way to survive.