Pond Boss Forums STOCKING A NEW POND Types of fish to choose Koi?

Zep:

Maybe not 100% one or the other, but yes, what you saw is typical, at least around here.

Only if you kill the plants AND the FA do you have a snowballs chance of establishing a bloom thick enough to minimize plant and FA growth by limiting sunlight hitting the pond bottom.

In my experience:

Kill FA = underwater plant growth exploding.
Kill Underwater plants = FA growth exploding.
Completely kill both = getting a bloom established.