Myst. Snail Love Repashy; Does Repashy Love Them Back?

Soilent Green specifically. I see a very small amount of copper, but I have read from some online that it is chelated and in such a small amount that it is safe for snails. I'm out if my depth here.
Any thoughts FishLore community?

 

I tried it on some pond snail babies. They all died. Next batch of babies I just had buckets of water hanging out in the sun. Plenty of algae for them to get big on. But then, I haven’t had any luck on repashy.

 

I use the soilent green..... however not as a staple, more as a treat. Maybe once every other week. Several in my tank like it. I also feed them blanched zucchinI and spinach, hikarI sinking wafers (both orange packet and green packet), American aquarium omnivore, tetra shrimpwafers and plecowafers, omega one shrimp & lobster pellets and veggie rounds, and I'm sure they eat some of the Bacter ae as well as some of the other food I feed the fish and shrimp.

This may have some useful information:
Mystery Snail info

EDIT
Forgot to add, I've been feeding the repashy soilent green since about October 2017

 

I personally would not use anything that contains copper in any form or amount

 

You are both so helpful! Thank you for replying. Thank you.