Shrimp not eating wafers/pellets
I keep about 20 shrimp in a 16 gallon planted tank. They graze around all the time, and when I drop in the food I want to give them (Hikari Crab/Calcium pellets/algae wafers) into the feeding dish, only some come over and take a couple of bites now and then... so I don't think every shrimp gets a bite of it. However, I read that I should supplement their diet with protein/calcium other than the algae/biofilm that they eat so that they won't face molting issues and the like.
But if they don't crowd around and eat the food that I want to supplement for them, how do I ensure that they're getting a sufficient and wholesome diet? Anyone else that keeps shrimp in planted tank that faces these issues too?