Inverts not moving

[sandman12]

I have 20 blue legs and 12 astrea snails that have been VERY slow and hardly move at all. Alot of them are flipping them selfs over and just sitting there. What would cuase them to do this? My first response is to check Iodine so I will do that soon.

 

[graveyardworm]

If your changing water regularly then I wouldnt be too concerned about iodine yet.

I'd be looking more at tank stability. Like how long has it been set up? What are you using for top off water? How much does salinity fluctuate? How much LR? How much/how often do you feed?