A second critter out of the blue... you have some good quality live rock, that's for sure! You can expect to see hitch hikers appear even many months after setting up an aquarium. I once had a new HH appear after nearly a year. I guess eggs and lava can last a long time in LR
BTW, I've been reading a bunch of your threads and love your Pico. Very cool job indeed. Here's a thought on lighting for that tank... if you upgrade the lighting, you can grow a few hard corals - after
you are sure your tank paramaters are stable - which can take 6 - 12 months. Check out my pictures and comments about a Curent fixture that will fit your Picotope perfectly: http://www.aquariumadvice.com/forums...-108865-2.html
Just note that I replaced the original lamp (a combo of actinic and 10,000) for a daylight duo lamp (6700 - 10,000) because my Picotope is a fresh water planted aquarium... so the color you will see does not have a blue actinic cast.