I quickly started to look for an alternative. Another often used DIY spawning media are plastic Poly Shakers and Green Pom-Poms, being a more expensive alternative to yarn. Still, I kept searching and exploring other possibilities.
Again, I though about artificial aquarium plants. Previously purchased plants were not quite suitable for spawning, being stiffer than I though and having many leaves, that would be hard to clean. I needed something very durable for multiple use, something easily cleanable, and something very soft and not abrasive to the fish. That something appeared to be "Hairgrass" from Aquatic-Flora, manufactured by Deep Blue Professional. It answered all my requirements. These artificial plants are made of soft and firm, non-toxic silicone-like plastic. Having a slightly higher cost than Poly Shakers, I hope it will pay back on a long run. And it looks very natural indeed.
I bought six "Hairgrass" plants 9 inch (23 cm) long (they also come in 6, 11 and 18 inch length). After dismantling them, I ended up with 12 individual rosettes. Using glass bead with a string through, I inserted the bead inside the rosette and threaded the string out through the rosette. I can bundle these mops in any way I need and with weights attached to them, they can be placed on the bottom of the pond or be suspended from the surface.
As I run this media through a spawn or two, I will post an update.
|"Hairgrass" turned spawning media|
|Glass bead inserted inside the rosette|