Like everyone else said, you need to start checking and dosing alk. I finally had to start a couple weeks ago. I would agree, bump the temp to 78. 2 other things, are they getting too much flow? Also, do you dose mag? I've got a 60 gallon full of softies and euphyllia and have to dose mag daily and now alk daily, every other day... still playing with that one. The amphipods are definitely harmless though.