I bought plants from my greedy pet place and i just put them in my 29 gallon fish tank that i am now cycleing. I want to know if their is any thing i need to take care of them(besides light). The guy at my pet place said that he dident do any thing to his plants and they lived in his 10 gallon tank. Then he handed me a 7.99$ bottle of stuff and told me that i could put this in the tank also. That it was some kind of plant feed. I decided to wait and see if my plants really needed it. If my plants started to look a little brown or any thing i would get it. Do you think it was the right call? Do you know if i need to do an thing else to them?