[quote=D.R.;14054]some good pointers from Merlin, its not a common parasite in domestic ponds, did you introduce wild fish or plants at any stage?

The organophosphates were nasty, harmful to the environment and traces of the pesticide were left in the fish, this was a problem for trout farmers.

There is a treatment using hydrogen peroxide at 3% it leaves no trace.

Argulus females lay eggs attached to plants in the upper layer of the water. If you lower the water level by 12-18" it will dry out the eggs.[/QUOTE]

Now that is something I was unaware of, thanks D.R.