How much big bud

[QUADRO]

Could someone tell me how much big bud to use with a twenty gal reservoir its my friends first time and he not sure thanks.

[Sinsemillian]

I dont go by how much per gallon. I use as much big bud powder to raise my ppm by 250. I always add it last. If i am shooting say for a target 1600 for the week i would mix my main nutes to 1350 then add my big bud to bring it to my target of 1600ppm. hope this helps.

[stinkyattic]

If you are still in doubt, read the instructions on the jar... :D
You absolutely NEED a proper EC meter to dial in a hydroponics grow, especially running a regime that includes supplements!