I keep playing with temptation, and when I had water parameters of neutral pH, GH 7 and KH 3, I would have loved to get a couple of teacups for my 125. Now that my water is much harder, I wonder if it is even possible (or ethical) to try teacups in my hard, hard water. My GH is 25 and my KH is about 13, with my pH leveling out at around 8.5. I'd be surprised but excited to hear any knowledgeable person say it was possible to get stingrays. If not, just give me a slap upside the head to shake the idea completely out.
