I just rooted my Droid last week and put Cyanogen6 RC2 (Froyo) on it. That plus an overclockable kernel, Tasker and LauncherPro makes for pretty-much the ultimate smartphone.
Smartphones are now full mobile computing platforms, with all the associated advantages and disadvantages. Users need to be careful what apps they install, just the same as they would in Windows, Mac, etc.
I'd call and talk to James at Envision. Everyone has an opinion, best to get an informed one when the cost of being wrong is hundreds of gallons of saltwater on the floor
Same here, my MD refract. is still working great after about 5 years. Whatever one you get, make sure you calibrate it to a known specific gravity sample (read this article) and not to RO/DI or distilled water. "Slope error" isn't unusual, and can lead to significant differences between actual and measured values.
I'd just let it dry out completely, the cycle it. I can't believe people actually boil live rock -- that started out as a misinterpretation of "cooking" freshly harvested live rock, right?
Have you tried swapping the dry side magnets between the two units? I've found that they aren't always interchangeable; some dry sides work better with certain wet sides than others.
I'd sell the livestock, clean up the tank and put it in the back of the garage and forget about it for a year or so. If, at that point you still want to get rid of it sell all the gear. Who knows, you might decide you really miss it and it'd be a shame to take a bath on all that nice gear... It's not like it'll depreciate any more.