A. Cause: Saprolegnia spp. and Achlya spp.
B. Characteristics of Pathogens:
- Characteristics have hyphae that are so long and not septic, live in a freshwater environment but there are those who can live in salinity 3 promil.
- Grows optimally at a water temperature of 18-26 oC. Asexual reproduction, through Fertile hyphae to produce infective spores.
- Infecting all types of fish that live in fresh water including infecting eggs.
- Trigger pathogenicity of this fungus, among others:
injury to the body, malnutrition, low temperature & oxygen content, high organic matter, bad egg quality / infertility and / or high fish / egg density.
- Attacks are chronic to acute, can result in fish deaths reaching 100%.
C. Clinical Symptoms:
- fine threads on the body of a fish that resembles cotton that attaches to the egg or wound on the external part of the fish's body.
- Mycelia (collection of hyphae) is white or brownish white
- Avoid stress on fish
- Maintain a pool water temperature of 28 oC and / or make new water changes more often.
- Maintain stamina and increase the resilience of the fish body through immunostimulation (eg. Addition of vitamin C in feed)
Fish treatment can be done in a way
- Potassium Permanganate (PK) with a dose of 1 gram / 100 liters of water for 90 minutes;
- Kitchen salt at concentrations of 1-10 gr / liter (depending on species and size) for 10-60 minutes;
- Treatment of fish with herbs can use leaves (Drymaria cortada) by: mixing 5-10 pieces of fresh leaves with water, then squeeze the water and dissolve it into 30 liters of water. Use the solution to soak sick fish for 60 minutes.