Colored Sand?

[Traxolotl]

What kinds of colored sand do you guys use in your axie tanks? Or what do you use over all as the substrate for your tanks?

 

[Chirple]

I have white sand in my tank. I've discovered it's nice because you can easily spot messes on it.

I have some river rocks in there, too, although they're more likely to hide messes that fall through the cracks.