That’s surprising about the Xenia lol, and yeah I haven’t seen anything about it harming fish, I just wanted to be triple sure about it not harming scaleless fish and I didn’t find enough comfort to try it hahaAll my softies (mostly leathers) are fine; Ironically the only think that didn't like it all that well was the hard-to-kill Pulsing Xenia (lol). Like many, many others, I have a Love/Hate relationship with Vibrant; sometimes I'll just 'spike' the dank with it (like a drink-- Ha!) But I have never known it to be harsh on fish.