I just feed them for 3 days (don't offer anything else -the anti parasite pellets are last choice for sure if they can eat anything else). After the last pellet feeding I wait a day before feeding them to the seahorses assuming that by that time they already pooped out the meds

Josh called the shrimp tiger shrimp or tiger tail shrimp when we caught them.

this probably sounds horrible but: when I noticed the tiger tail shrimp was eating my grass shrimp I took him out and gave him to the chickens (because they kill stuff quickly and I figured they might enjoy a little seafood)