I may have missed it, but how old is your tank?
You might consider buying a copepod stock to get a head start. They are an important natural food.
The first photo is the tank they are housed in. I have been fortunate to have success keeping them with a variety of tankmates, tho, I would suggest that if they are your first experience with SH, a species only tank will be less of a chore.
The second photo is just the girls (males are kind of a pain). I have not had a problem with illness or injury :joy: . The small pony, Fin has been with us for 2 years, the larger, Sophia, for a year or so.
What a treat they are!