Hi,
We have a 72 gallon tank inhabited by 5 tiger barbs, 5 neon tetras, 4 bloodfin tetras, 3 dwarf gouramis, 1 chinese algae eater, 1 cory, 1 clown plecostomus (small), and 2 swordtails. We have twice tried putting ghost shrimp in the tank but they disappear quickly. The fish ignore them while...