Please help. I just got some dwarf gouramis (one male and two female), they've been in the tank for about a four days. They seem pretty happy, they eat well (flakes and frozen bloodworms) but it seems the male gourami is sick with something. he's got this dark colouring beginning to spread on his body... i've recently changed the water to no avail...
if anyone can help please do....

if anyone can help please do....

