We have all colors up here at my pet store. White, sand, yellow, green, blue, orange, pink, purple etc. We even have glow in the dark! My 50 gal has purple sand mixed with white, my 40 has sand color and my 20 has white over top of yellow. The yellow was terrible, that's what Howie had originally (first pic), very dusty and way too fine. I believe it was the brand tho.
I think I'm crazy because every month I spoil the heck out of my Axies, espesh Howie, prob because he is so social and the others hide lol but anyways I am thinking about upgrading his tank to a 20 long this month, I love the way his tank is now so if I upgrade it won't look much different other then there being more room for him, plus I'd like to introduce Raj (my baby wild dwarf) to Howie as a friend when he is big enough.