watchman and fires go together fine. if they are big. 2-3 at a time is safe. make sure you test the water often for a while to determine if you need to make more frequent water changes due to their size.
then if everything's fine, throw some pistols in there too.
have you ever heard of pistols needing iodine when they molt? ive read that they need a supplement. i have 7 ghost shrimp, and they molted just fine without iodine.
one of my red clawed crabs died after its molt, and i read they also need a supplement during molting as well. the pet store had never even heard of that, but ive read about it online many time.. just a heads up one that.
anyone got an opinion on that??