with a 16 oz bottle. I fill it up all the way to the top and equaly give to the three plants (with the superthrive of course) and then give them nutes once every five days. Just make sure your soil is nice and moist.
Let me put an example: Mon-superthrive @ 8am/ Tue-superthrive @ 8am/ Wed-superthrive @ 8am/ Thurs-no waterings of any kind, let top layer of soil dry, make them want the next watering/ Fri-same amount of water only this time use your nutes. This is the routine I have been using, of course you can change the routine when ever you want. For some reason they tend to thrive when letting the top layer of the soil dry up, its like they sucked up all the moisture and now need more so they activate backups to survive. Its wierd to explain, but thats how I see it.
Anyway your doing a good job, and the one you think is a male, its probably a female. if it's more than 20 days old and you havent seen any sexes, its a female. even if you see a male pollen sack show up later, its a hermie. but for some odd reason, I had a hermie, it sprouted a couple of male sacks thinking, YEs! I will get some feminized seeds. but like I said for some odd reason, those sacks never made it, they stop growing and never opened up. I was reading on a forum once stating that lowryders have hard times pollenating its self. meaning the percentage of plants bieng hermies is 17%. NOw I don't know if this is true for all Auto-Flowering plants, but it sure was true on mine.