I sort of have this love-hate relationship with my fish tank. It's a complete pain in the ass to take care of consistently, but when it's in good shape, it really looks cool.
Lately, I've not been paying as much attention to it. Sometime in the last few weeks, I started getting a bunch of algae growth. Probably high nitrates or something. Anyway, it's really annoying... clogging up filters and such. It really looks bad - all overgrown and you can hardly see through the glass.
Since I've gotten this tank (I had others before), I've owned one starfish. It was a sand sifting starfish and it died more than a year ago - before I moved the tank to our current house.
Last night, I was reminded of one of the cool things about salt water reef tanks. Before heading up to bed, I stopped to take a look at the tank. There lights were out, and moving across the glass was a starfish about the size of a penny. WTF? Who knows if I'll see it again, but it's always interesting to see the random creatures that pop up, seemingly from nowhere.