I just got a new bag of this stuff and my discus and africans won't hardly touch the stuff. The last bag they eagerly chomped it down. If it was just the discus, I would chalk it up to them being their usual picky selves. But with the african cichlids not eating it (they'd eat gravel if I sprinkled it in their tank), I'm wondering if I got a bad batch or something. Anyone else have this issue?