Quote Originally Posted by herbie the love bud
Now here is something that a lot of people don't understand about nutes: The amount you make should be based upon one feeding per week! Let me explain: If your plants drink 5 - 8 gallons a week, let's say 1 gallon per day, then you would mix 1 gallon of the nutes/water, and then just continue to feed water for the rest of the week. That's it, all the rest is waste.
Intersting. I've spent a lot of time on a lot of different growing forums and I've NEVER heard anyone else mention this. I'd love to hear a little more regarding the rational for this, because quite frankly, I'm not sure it passes the logic test.

To OP, GH nutes (both the basic Flora brand, and the FloraNova brand) work well for hydro. As Herbie stated, they're not the absolute best, but they'll do the job well and give you a grow you can be proud of. If you're going to use GH, I'd recommend you take a look at the Lucas Formula. It's a basic beginner's nute program designed specifically for MJ. Once you've mastered that, then you can start playing around with more advanced nutes and suppliments.