Pink frosted rock from Big Al's

[monocus]

sugar.a pic would help.sounds like it has quartz in it.could be rock salt if it dissolved(hallite)

[Kait]

Tank. by [Kait], on Flickr

This is the rock in my tank - it looks like an ice cube when it's wet. I'll get a picture tomorrow when it's dry.

I was thinking it looked similar to quartz too, but really know nothing about rocks.