Bud Hardener?

[Jamrasta]

Hi folks.

Looking at buying some some bud hardener called Hammerhead PK.
I'm currently growing in coco coir and using coco A & B.

My question is, Do I use the bud hardener AND the A & B together.
or
Do I stop using A & B and just use the hardener now?

It hasn’t arrived yet but I like to know in advance what the score is.

Hammerhead PK was recommended by a friend so hopefully he’s not wrong.

Thanks in advance for replies

[oldjarhead100]

I use pk boosters with my other nutrients ,you do know the thing that will harden your buds the best is a good light with a higher wattage hps,cmh,and leds I wouldn't get anything under 600w