Sounds a little heavy on the nutes for just starting with. I've never used the Sensi stuff, so I can't say for sure. For hydro, TDS is almost as important as a PH. Get yourself a TDS or EC meter*, you can find them online for $20. Look around for a TDS chart for a hydro schedule. There are different schools of thought, what I do is start out with around 400ppm and increase it about 100ppm per week until it's 1400ppm at 10 weeks, but that's just me. Do a search for "lucas formula" for something simple to follow.

Honestly, I'd use half what he recommended until you get your TDS meter, just to be safe.

I don't understand what he's telling you about only running the bubbler for 15 minutes a day. No, if you've got a bubbler system that sucker needs to be on 24/7, especially when roots are in the water. In a bubbler, the bubbles oxygenate the water and hit the roots with air so they aren't completely surrounded by water all the time. You almost can't have too much, but you can sure have too little.

And 6.5 ph is too high, in fact that's the upper acceptable end for hydro. Keep it slightly under 6.0, aim for 5.8 or 5.9.

I don't know dude, sounds like that guy is not giving the best advice. Maybe he's a soil grower or something. Buy your stuff there, but come here for advice.

[*] side note: there's really no such thing as a true PPM meter. All EC/TDS/PPM meters measure EC and only EC. When it says it's a TDS or PPM meter, it's really just an EC meter that automatically converts EC to TDS or PPM.
SecondNut Reviewed by SecondNut on . Im doing a bubbler grow and have a few questions ok I planted 10 seeds after germination into rockwool and then thats is placed in clay pellets with a wick installed. 8 spouted right away another just started to sprout like a week later so its pretty far behind, Is that going to be a weak plant for sure or should i just see what happens. each of the 8 plants that spouted are 2-3 inches tall standing straight up not like others i see where they cant stand and where just streching to the light. They do seem tall to me. I have had the Rating: 5