Did Anybody order Pea Soup Ah, the sights, sounds, and smells of spring around the pond. It seems they are spawning every few days. You do a water change to get rid of that excess ammonia and they spawn again. The toads and frogs make a heck of a racket into the night laying their strings and mats of black pearls. The fish gobble up the mats but leave the strings to develop into tadpoles that feast on hair algae or your favorite plants.
Life is everywhere.
And then there's 'Soup du jour', usually Pea, rarely Bullion. Why does this happen when things are going so well. Especially right after you added that special brightly colored koi with a name you can't say, spell, or even remember. It actually isn't so bad, unnatural, expensive, or even hard to eliminate. A look at the nature of the beast will yield both secrets and questions.