Medaka egg harvesting techniques: spawning mop, floating plant, and wool pad methods — collection timing, egg handling, and storage for hatching.
Key Takeaways
Medaka egg harvesting techniques: spawning mop, floating plant, and wool pad methods — collection timing, egg handling, and storage for hatching.
Efficient egg harvesting is the first step in medaka breeding. Optimizing spawning bed selection and collection timing significantly improves hatching rates.
Nylon scrubber type: Most common commercial option. Green mesh material makes eggs easy to spot. Float at surface, collect every 2-3 days.
Water hyacinth: Most effective natural spawning bed. Dense roots attract heavy egg deposition. Move roots to separate containers weekly.
Yarn mops: DIY acrylic yarn bundles. Cheap and mass-producible. Use 100% acrylic (wool decomposes underwater).
Check in the morning (medaka spawn at dawn). Gently pick eggs individually with fingertips. Remove attachment threads between eggs (prevents mold spread). Transfer to clean water.
Add a few drops of methylene blue for mold prevention. At 25C, hatching occurs in approximately 10 days. Remove white, cloudy infertile eggs daily. Predict hatching via accumulated temperature (approximately 250 degree-days).
Bri-Choku offers mature medaka ready for breeding, including pair and egg sales.
Find Medaka listings related to this article on BreederDirect. Buy directly from verified breeders.
Aquarium Volume Calculator
Calculate water volume, weight, and heater wattage from tank dimensions
Water Quality Checker
Find compatible fish, shrimp, plants & corals based on pH, temperature & hardness
Breeding Calendar
Visual monthly breeding season guide for each species
Compatibility Checker
Check compatibility between two species on a 5-level scale