Here's me thinking out loud.

I've read that all clowns start out sex-less. After about 1" they become males, and from there the dominant of the group become females.

Both my clowns were about .75" when purchased and got along famously. They are both now about 1", however the bigger one is about 1/4" bigger than the smaller one.

Could they now both be males and are now fighting for dominance?

How long does this fighting last? When I first got them, they seemed to bicker for about a week, and since they were fine.

Also, they started fighting once the hairy shroom began to open up all the way. Could this be the issue? If so, would adding another so they both have something to host solve this?