some help with plant maintenance

[prodrive]

Hi guys,

Ok...i know i need a pic to better illustrate what I'm saying. i'll snap one when i get the chance later.

the query is i have a green leafy plant (leaves are shaped like spades and the size of a 50 cent coin)

It has black spots on it.......can i snipped away the leaves and leave the stem?
in botany sense, that will work right as the stem will regrow with leaves.

Also, where should i place my CO2 atomiser? i place it near the bottom of the tank..... is that ok? so far, i can see the leaves near the atomiser is pearling....but i'm
not sure also whether is pearling or is it CO2 landed on the leaves and form bubbles.

[felix_fx2]

off the Co2 and filter, just leave lights on.
if it is pearling, you will continue to see plants do it...