Is a CD made out of acrylic? I"m thinking cheapest option is a stack of blank CDs or DVDs? I see you can get colored ones (blue, or they make ones that look like LP records with black outside and colored interior ring). In my pond we get enough silt that what ever color the disk is it wouldn't stay that color very long. I'll search for other spawning structures too. Probably any plastic would work.
Males in spawning color are so beautiful!
I have waded out to my spawning structures which I mounted on a threaded rod with hex nut in between each CD and then pushed the long end of the threaded rod into the pond bottom. I could then rock the platter stack back and forth in the water to try to clean the silt off the disks and presumably the eggs. I don't know if silt prevent eggs from hatching and the silt comes from rain events with runoff into the pond. This is where if I could figure out how to keep a little water moving over the spawning structures it would probably help the eggs survive.
If they have a center label, I found that peeled up within a few weeks.
I used 1/2" ready rod and drilled 1/2" holes in pallet beams. a double nut on top allowed me to take a ratchet and drive the RR into the hole without stabbing a hole in my sealed pond. When I did this I found 100 packs of blank CD's at wally world on clearance for 7-8$/100. Now, I can't say that I had any success so I.m the wrong guy to suggest what works.
