Ace will ignore everything, including his betta hammock and prefers to sleep on the gravel (like the bogan fishy he is!). Spike sleeps in between some soft plastic anemone thing, and it's super cute, cause all you can see is his head! Finally, Stu prefers to sleep in his log, or randomly sleeps on top of his fake plants... I'm not sure how it works, he looks super uncomfortable to me but he seems to enjoy it.
Mulan: Blue/Green/Red HM Male
Those who now swim in the Rainbow Ponds:
Spike: VT Purple Male
Glaedr: CT Yellow Male
Ezio: DeT Dragonscale Male
Stu (Founder of the obsession): CT Blue Male