honestly my first clown fish died in the 2nd months of tank. in 2 months your parameter isnt staple enough so it could be that too. shrimps are more invariable than fish to water parameter changes. im not sure if small emerald would cause it. but i can tell you this, your adding too much livestock too soon and your system wont get to use it quickly. i'd say wait another month or 2 to add inverts. please state what brand test kits your using cause API isnt accurate at all.
