Ok i had some salousi fry in a tumbler for a few days.. After a little while some of them got white growths on them that wre read around the edges. The eggs were in the wriggler stage and all the levels were fine. Could this be due to a lack of tumbling... The eggs weren't moving but water was flowing past them... Has anybody got a video so i can gauge what current and "bounce" i should have. Along with a diagnosis of my problem.