Yeah pretty much, wanted to add some Silicate to my lineup and the Grotek is way cheaper than the Rhino Skin... This is my first grow trying out the GP Pro-Cal so I'll have to wait till I've done a full grow before I can comment on it... I like that it has less N in it then the other stuff I was using though.
I picked up TechaFlora MagiCal because it's water soluble and 2% nitrogen. I've been sticking with Rhino Skin because they "claim" it won't affect the pH like other silica additives. Probably just a sales gimmick TBH.. it really bothers me that they won't list their true percentage. I have such a love hate relationship with AN lately.
Sent from my iPhone using Tapatalk