Here in Tampa I would have expect spawn a few months back, on the tails of cooler weather. However, my school choose to wait for the rainy season and this morning that lovely odor and thrashing about was afoot.
I've read that people do a water change (10% I assume) when this happens. What I don't know is the timing. How do you know when they are done? Or just do it within 24 hours? 48 hours?