Any tank that I've had two or more mature males in turns into the froggy version of WWWF! :lol There's no rhyme or reason for it, be it full moon, new moon, no moon or whatever! They'll usually start around 9 or 10 in the evening and can go all night long with their little flipperty-cuffs! Since there's no females in this tank any longer, they pull a few more all nighters than they did when there were females to distract them after while. You can check out a little more on this aspect of them here.

todley