RBTA at top of tank

[thorodenasgard]

Had a rose nem for about 1 1/2 months. He has a pal porcelain crab. But the nem moved to the top of the tank in slight shade. He appears to be healthy but why. He was attached to a rock for weeks. I would guess he's getting only 100 par now but was in 150-200 par before.

 

[windlasher]

Check your salinity. I had a BTA that stayed put for a long while and started moving up for some reason. It was a while before I realized that my salinity was waaaay off. Nems usually move because they are unhappy about something. When I fixed the salinity, he went back down to the rocks. Not saying that's it, just sayin. Also, old bulbs can annoy them as well.