Just to give you an idea this is Grow Big Hydro by itself @ 10ml per gal Works out to 292 ppm plus starting water. That is a little more where you want to be @ 7-10ml per gal depending on starting water. 10ml being RO water. Way better ratio. Reg Grow Big IMO is trash unless using amended...
www.thcfarmer.com
That's the post I couldnt find. The issue is the ratio with GB Hydro is good as a standalone but the Fe (Iron) is high so running the nutes up to like 700-800 ppm for flower will most likely see a lockout from the High Fe. Would work great if you were supping something Cal Nitrate along with a K/Mg source (cheap booster without a bunch of P - even MKP but thats a number cruncher). Then again I'm a salt head so can't really say another cheap bottle you could pick up on the fly without really looking into it. If they had run the micros a little lower GB Hydro would be one of those 1 and done bottles.
Now how high you might be able to run it I can work out in a little. You are on tap right? Know the PPM of starting water or have access to a water report? That will come into play a lot specially with stuff like Ca and Fe. About 5 ppm of Chelated Fe is about the upper limit I would run.
Edit: I also need to check if I matheds that right in that breakdown.
