Astrea snails being weird

[wartooth1]

So I added 5 astrea snails to my tank last week to beef up my CuC a little bit. But the thing is, since they've been in my tank, all they do is climb to the top and sit halfway out of the water or inside the "waterfall" my filter creates. I tested my water thinking that there is something about it that they are not liking... but all of my parameters seem fine. I even did a 25% water change and still they act like they want to avoid the water when possible.
All other fish/inverts/corals are doing great... just these astreas are being funny... or is this normal?
Any ideas?
Thanks.

 

[tangs rule]

I've got 30 or so astraea in the big tank, and at any given time, a dozen of them are parked right where yours are. In a few days, they move on, and others will park up there. Normal i'd say.

 

[meowzer]

YES, it is normal....I have astreas in all 5 of my tanks, and there are always some at the top water line

 

[wartooth1]

ok just checking thanks!