Hey thanks Bev, I guess there were measures to be taken... woops.
They weren't both in the same tank "yet" but the plan was to put them in a new bigger tank in a few months' time. It's just that the little tucker needed a home "now" and I pushed things a bit...
As far as keeping multiple anemones, the strictest advice is to dedicate a tank to keeping ONE - with very little else. After that, you increase the risk exponentially, apparently - another of the same species, or maybe add a different species, then a whack of corals, some more fish, etc etc...
I didn't even get to that point, but had a crazy idea to move in that direction. I already have fishes and corals in the 50 with the big LTA - bit of a mixed blessing - it's getting pretty crowded in there...