Hardiness of some pest.

[Brianscherer]

So I had a small rock with what I was told was Mojave anemone, kept them in the tank for a bit as i was starting out and they closed up for the most part. They started to be less active and started to stay closed as my tank got more adjusted. But knowing what they were i took the rock out and put it in a container of water from the tank they stayed( a lid at night but no circulation and gave light during the day) they opened up more. Did this for a week. Not much change so I fed them a large amount of food 3 days ago and they are out bigger than they were ever. With no water flow but i have kept the water level stable for the most part.