Re: Problems due to infusoria by P. quindecim November 25, 2011 at 9:36 pm #3963 VolkerParticipant Hi Knut, I had a similar problem. I moved the fry into a breedingbox in the tank of the parents with water circulation(like a Gerdkasten). Didn´t lose any further fry. But they were already around 1 to 1,5cm in size. Volker