Well like any food it wouldn't be good as exclusive feed but as part of a range of foods I see no issues with it (more meat on their bones than brine shrimp) Mysis shrimp are a regular part of the diet of my tropical fish.
the way i see it is.. my FW fish wouldn't eat mysis shrimp in the wild.. so why feed it to them? if i'm going to feed them live/frozen foods, they'll be organisms that were fw to begin with.
THE CURATOR'S CHOICE
Used by over 90% of public aquarium in North America.
FRESHWATER MYSIS (Mysis relicta)
This eliminates the possibility of parasite or disease transfer to marine fish.
SODIUM FREE
As fish don't need to eliminate excess salt, it's easier on their systems. Most other brands offer a coastal, or marine cousin of Mysis relicta.
ALIVE ON HARVEST and immediately flash frozen in premium condition. That's why PE MYSIS is clean and intact.
HIGH FATTY ACID PROFILES (EPA and DHA) are related to the food chain found in deep cold waters, where PE MYSIS is harvested.
OMEGA 3'S. Greater values of Omega 3 can be found in PE MYSIS than krill and enriched brine shrimp.
NO BINDING AGENTS, fillers or water added to packaging.
NUTRITIONALLY COMPLETE
PE MYSIS does not require the addition of vitamin or color enhancement products.