Only assassins to my knowledge won't eat algae and are purely carnivorous. They will reproduce if you have two, but not as quickly as pond snails or mts. I have them in my fry grow out tanks to eat up the leftover high protein foods, but believe me, they do not eat the algae lol.
Last edited by angelcraze; 12-10-2013 at 05:23 PM.
Reason: Added a bit