This is a fish I've considered for awhile. A lfs has had a female for sometime now. My only concern, will it eat my clown goby? The fella is a good 1.5-2" but to most triggers bite sized lol. Thoughts?
Horses are slow methodical creatures. Crabs will eat anything they can get. Horses are best kept only with horses and few other fish. Pipe fish, draggonets, ect. Snails are fine. Crabs i wouldn't trust
Welcome to saltwater. Do not replace the substrate. The stuff in it would wipe out an entire tank. You don't need an under gravel filter. Your hob is fine. Nitrate is the least of your worries. Ammonia is the thing to worry about. Get a good liquid test kit. Selifert or red sea are good...