its been about 2 weeks since the reservoir was changed. I'll start filling up RO water tomorrow. It's going to take a really long time to get 40 gallons, the tank fills around a gallon an hour.

i didnt think about the nutrient uptake before, that makes perfect sense. so the more reservoir changes, the better. '

When i top off, in addition to the grow nutesshould I use the liquid karma and superthrive? Or just have those in the beginning when i fill the res?