chalice ?

[monkeydude]

Got a few chalices starting to recede around the edges. Any clues. Amnonia and nitrates in check. What should I check next. Dip maybe?

 

[zdawgnight]

might be to much light or flow i have mine on the bottom of my tank

 

[Underwaterparadise]

What are your Ca. and Mg. levels at?

 

[ktar]

i am having the same problems and i think the amphipod are chewing away at edges. i see a whole lot of them critter once i turn off the light.