Seawater aquarium situation

Time has passed. A few fish lost and dead. Otherwise, the aquarium can do well. In my 400-gallon saltwater aquarium fish are mostly hawaiian area: Yellow Tang - Hawaii (Zebrasoma flavescens) Blue Tang (Paracanthurus hepatus) Sailfin Tang (Zebrasoma veliferum) Chevron Tang (Ctenochaetus hawaiiensis) Clown Tang (Acanthurus lineatus) Flame Angelfish (Centropyge loricula) Potter’s Angelfish (Centropyge potteri) Foxface Lo (Siganus vulpinus) Snowflake Eel (Echidna nebulosa) Marine Betta (Calloplesiops altivelis) Firefish (Nemateleotris magnifica) Yellow Pyramid Butterflyfish (Hemitaurichthys polylepis) Longnose Hawkfish (Oxycirrhites typus)