little info first...
20G tank, 78* F, AC30 HOB filter, no live plants
Tank contains: 5 odessa barbs, 4 marbled hatchetfish, 1 rainbow shark, 1 apple snail, and 1 ADF.
2 of the barbs & 1 of the hatchets were added about a week & a half ago, along with a 5th hatchet that died yesterday (he was...