Cork in a bunch of varieties can be used. You could use the corks from wine bottles, provided you find a way to remove the sulfates and sulfites that would have been absorbed from the wine.
Or just use a variety of corks siliconed to the backgound Or easier yet, Maryland Cork Company has a product called Cork Insulation where they take a bunch of granulated cork and put it in a mold which is placed in an autoclave and steam baked. This causes the natural resins to liquify and once cooled the mass solidifies. The end result is a very natural product that looks awesome.
Here is an example of a tank that used this product. First photo shows it sparsely planted and the second is fully planted.
-Easy to mount plants on background
-Looks nice on interior and from exterior
-Hard to create depth & contour
-Can get pricy
-wouldn’t trust it to hold much weight
Have you ever used cork for your background? Did the plants love it? How did it turn out?
Hope you enjoyed day 3! Stay tuned for tomorrow which will feature letter D, yep Saturday! This Challenge doesn’t stop for Saturdays! Only Sundays!