I am new to sw
. Few days ago started cycling 30 g tank with 40lb of live sand and 40 lb of live rock. I cycle using pure ammonia. But not cycling is my question.
I purchased live rock, let's say, used. It is cover in a lot of purple coralline algae and even couple of polyps. Tonight I noticed few "bugs" hiding in a live rock. I am not sure if they are good or bad. They are about 1/8 of an inch, silver/grey, with couple antennas and few legs on each side. When I shine light on them, they immediately hide.
Guy I bought live rock from just had live rock and sand in a tank, few snail and crabs here and there, but no fish.
What are they? Like I said, it is my first adventure in to salt water world.