Parasitic Tegastidae copepods "Black Bugs"

[Frogger]

Interceptor treatments have only reduced the numbers but have not eliminated them. I increased the dosage to double yesterday and they are still active today. Will likely triple dosage next week if no improvement. Sometimes it takes a while for the interceptor to kill them. I will leave it in the water column for a couple days before turning on skimmer and adding activated carbon.

Apparently you can go up to quadruple dosage and not adversely affect the corals and fish.

Will keep you posted. I will try to get a picture.