Currently I'm just using a zoomed large floating platform, and I have a custom 'beach' made of plexiglass and filled with sand. I want to upgrade the floater to something better looking and a bit bigger. I was thinking about forming one using material from hot tub insulation. Anyone ever had experience with this in an aquarium once it fully cures? It feels very similar to the stuff used by pet supply cos for their floating docks.
Also how sturdy is cork bark if you were to drill a couple holes in it to run metal guuides through the back? (like most other floaters are setup) I don't really wanna wedge it width-wise in my tank and would rather have it oriented length-wise.

