WaterFarm single plant top feed bucket

The water farm system is designed to run 24/7.
The strength of your nutrient solution depends on the strain, but at 7-8 inches you can start increasing the strength. Do it slowly until you see some nutrient burn, then back off some.
Remember that with floros, get as close as you can, if you feel heat on the back of your hand when holding it just above the plant, its too close.
There are plenty of threads on water farms and floros to answer all your questions. Quit staring at the plant and read and read and read....

(After reading for over a year, I am just starting to feel comfortable doing a grow.)

Good luck.