We bought peppermint shrimp and they took care of all of ours. We didnt have any bigger ones though only smaller ones. Hermit crabs can also eat them unfortunately they are usually happy enough with the leftover food on the bottom and the algae on lr
, butterfly fish usually eat them too but your tank seems quite small for 1 of them. You can inject them with a calcium solution or Kalkwasser additive. I personally would try a peppermint shrimp, I like to stay away from any chemicals if at all possible.