20 Various size and colours Black Malaysian Trumpet Snails. 
(Perfect food for Assassins snails)

It will not eat your plants The Black Malaysian Trumpet Snail feeds on detritus and leftover food that is underneath the substrate Great for aerating the substrate. Substrate aeration is a great benefit to planted aquariums as it promotes air exchange and root growth. The Black Malaysian Trumpet Snail reproduces live young and does not lay eggs Hardy. Harmless. Hard to kill. Hard-working.