Based on what I saw from the slide deck it appears that aluminum siding could be used... hmmmmm.... my next step will be to find rigid material that can be easily worked and preferably come in black or dark blue. thinking the spacer between disks can be forthright but some tension or other add-on to keep the 1.5-3.0 mm spacing tolerance right out to 4" from the center or make three spacers that go on the "outside" of the rigid material, think isosceles triangle that would def keep the spacing in currents as I'm betting I'll get a gully washer while they soak (high currents) and want them to remain viable.

Well - about in business.... https://hkresale.com/collections/ne...plexiglas-laser-cut-sheet-7-3-8-diameter

So they are 1/16" thick reg acrylic disk is 1/8" so chip up a reg 1/8" and one 1/16" disk - make your platter with some plastic bonding glue handy, glue three 1/8" chips in that isosceles triangle about half way from center to edge, alternate with three 1/16" chips and build as high as you care to. Strong and "hosedownable" to wash out/off between collect/hatch cycles. Prolly make some kind of removable weight connector on the bottom disc, removable D clip connector on the top disk.

Last edited by Stressless; 02/15/22 01:57 PM.
8 Ponds in Mid-East Ohio, three streams that merge to 1.

Fishbowl Pond - 1.5 acre, family swimming hole, 22'
Figure 8 Pond - 1.25 acre, 12'
Crescent Pond - 2 acre 11'