Acan warfare

[lastlight]

I know there are different types of acans but how can you know which can touch or be near each other? I glanced into the tank a moment ago (lights aren't even on) and I saw this. Glad I noticed. I shook the poor little frag off and moved him further away. They've been next to each other for a month or more! The Green Loaf def won.

In general I'd say most of my acans look like the one that got attacked. seperate polyps that are easily distinguished even when fully inflated. The green guy looks more like a smooth surface.