stunted growth?

[Nano]

Thanks for the replies so far guys, and Wayne funny you should mention the angel fish, I too since losing mine have notices crazy polyp extension. Not sure if its related but eho knows. My birdsnests are growing slowly, but the rest seem to be at a stand still, the bonzai I picked up as well as the purple cross haven't grown I bet even a 1/4" in 4 months. And i have 2 favia, one that grows like mad, and tge other is just starting to encrust the plug after 4 months its a littl confusing and frustrating