Aquarium plant food safe for fish?

[j250nyahweh]

I'm really sorry, I know this has to have been asked a million times, and I'm not sure if this goes here or in the plant section, but I found that I have some Aqueon Aquarium plant food that provides "macro and micro nutrients" and my question is this:
I'm setting up a new tank that I'm cycling for my pea puffer. Ive used bio media from an established tank in the new filter to "insta-cycle" it and I've also transferred some plants over to the new tank. My question is this, will adding this plant food either mess up the establishment of a new tank and could it be harmful to my puffer? He's going solo (except some snails) in a 5 gallon tank with 7500k high luminosity LEDs.
Thank you!

[mizzoutank]

here is what i do:


i dilute whatever i'm adding in either during a water change, or in a cup. then i add it in.
b/c if a fish were to swim straight through whatever it is...it could kill them.
but once its diluted and throughout the tank, they can hardly notice it.

[j250nyahweh]

thanks
It's a little scary to think that what I'm putting in there could kill him if he goes straight to it.... Yea, I think I'll wait until everything's settled before I try to add something that could be that disruptive