I have 3 new fish in QT that are being picky... They aren't eating Formula 1 or 2. The cardinals are going after it, but just spitting it back out. I'm having a little better luck with frozen "marine cusine" which has brine ,mysis, etc. The goby is starting to eat this, but the cardinals still spit it out. Any ideas what I can do to make them eat? I've tried soaking the cubes with garlic with no luck.