No fishy shower yet.
In the event they do spawn, I won't do anything for the first round. I'll just check to make sure they actually know what they're doing: that the little guy actually figures out how to fertilize the eggs. Who knows . . . he might miss and try to fertilize the capelin roe in the tank instead.
I'll order the starting cultures I need when the first batch of eggs shows up: so I have the cultures I need for when the second batch of eggs shows up.
Edit: The learning experience would be great. I'm just waiting to hear back from a place in the US to see if they'll ship the starting cultures that I'd require up here.