I have some kind of battle going on. I'm unsure if it's between my frogspawn and the 2 acan colonies or if it's between the 2 acans alone. A couple of days ago, I noticed one of my 2 acans started to shed some flesh and show tissue. Today, half of the colony at the top has shown rtn. Previously, both colonies were thriving and showing growth every day. Water is fine. Little high nutrients, but nothing different from last few weeks when they were thriving. I've taken a picture from the top, and one from eye level. My question is: who is the meanie and needs to b put in the corner? See attached pix: From the top Eye level Thank you for your help.