hey i got a fire dartfish and was wondering how to pair him with another one or how to tell the difference between male and female. the reason i want to pair him is because i got a coral banded shrimp who has been pinching my coral and has quite an attitude so back to the lfs. also could fire...

Does anyone know of an acurate way to sex common firefish are purple? I was looking to put a pair in a nano reef and want to make sure to obtain a pair!