I have been asking this exact question for a long time now. Aspen really does just fine in my opinion. Pretty much any loose substrate like aspen, coconut, cypress etc, will get into the water, especially if it is wet and sticks to the snake as he/she moves over the bowl. It is pretty much unavoidable. Aspen (where I live) is literally impossible to find in bulk so for me it is stupid expensive so I am one of those paper wasters and use unprinted news paper as it is super cheap, but if I could get bulk (or cheap(er)) aspen that is the way I would go.
I'm really leaning towards aspen... I use it for one of my snakes in a T8 and I like it better than towels. She rarely gets it in the water dish, just once every few days. There are a few downsides, though... still thinking.
Last edited by Penultimate; 07-16-2015 at 12:09 AM.
0.1 Onyx Pastel
0.1 Bumblebee Het Red Axanthic
0.1 Cinnamon Fire
0.1 Mahogany
0.1 Mojave Bumblebee
0.1 Super Pastel Pinstripe
0.1 Super Pastel Spinner
0.1 Sherbert Fly
0.1 Calico
0.1 Mojave
1.0 SuperFly
1.0 Enchi Lesser Spider (possible pastel)
1.0 Pastel Vanilla
1.0 GHI Het Red Axanthic