How to put Aquarium plants fertilizer stick

[takaco]

My neighbor gave me a box of aquarium plants fertilizer stick but i dunno where to place the stick.. The back description only say 1 stick for 20 liter tank

[tiintinn]

The fertiliser sticks will likely be insert in your substrate.

[takaco]

The fertiliser sticks will likely be insert in your substrate.

So as long the fertilizer stick is under the roots it should be fine right

[AquaObsession]

Yes. Under the roots or near them is alright.