Hey Keith, gorgeous sailfin! Does it have it's fins up a lot? I have a hard time getting shots of mine with it's fins up cuz it doesn't seem to do it too often. It's the biggest fish in the tank already, so I think it feels pretty comfortable... But have you noticed that they keep their fins extended all night? Every time I catch a glimpse of mine in the dark it's fins are up.
Scary thing with the RK2. Did you see my thread? My RK1 blew it's fuse. Not so bad cuz it just meant no lights and no fans/heaters. Took me a few days to get new fuses though so was doing the manual lights/fans thing.
I've heard that it is the male emerald crabs (two big claws) that eat the bubble algae. My sailfin ate a piece of bubble algae that got loose from my tweezers the other day. I just find a tiny bit here and there occasionally, maybe my tangs are keeping it at bay!