I just spoke with Aqueon this morning as I also heard this rumor. Bottom line it is partially true. They are discontinuing larger tanks with clear silicone. They will still be making them in black silicone only. I was concerned as I'm looking for a 180. But I can still get it in black silicone which is my preference anyway. The rationale for DC'ing big tanks with clear silicone is most people want the black silicone. That's the good news. The bad news is their glass drilling machine broke down and they are not currently drilling tanks.