you must adjust the ph or you're gonna have big problems. i used tb and you should also use big bloom because they are meant to be used together and not as stand alone ferts. start with 5ml per gal and work up to 15ml per gal with the tb but watch closely not to burn them. also you can use as much as 2oz big bloom per gal along with the tb. just start small and work up to it. i have found that liquid karma and thrive alive green used in conjuction with the ff ferts make a huge difference in quality and yeild! good luck