As of yesterday, I had four tanks (75g, 2x 20g long, and a 30g square) that contained aragonite sand substrates. Suffice it to say that I’m not happy with any of them. I have two other tanks that contain pool (silica) sand (75g and 55g).
Over time, I have honestly felt like my fish are more active and look better in the pool sand tanks. The tanks with aragonite are relatively new (~8 months) and I have had more fish problems with them than with pool sand tanks. Maybe it’s a coincidence. Maybe it isn’t.