I use some rinsed out bleach cans... Although my fish keep dying and I have no idea whyAlthough I totally believe in the artistic sense with the statement, I would say the fish really don't care as long as they have the shelter. Based on a long history of river and ocean snorkeling and diving. Fish hang out under cover, that can be a fallen log in the lake or the bait bucket that fell off the boat.
Jking