Robotochan
Fish Fanatic
Hi all, I've been hard at work all day fitting a new filter and I've noticed one of my Zebra Danios is rediculously thin. I tried feeding him but he took a bit then spat it out. All he seems to do is swim round in the centre of the tank in small 1cm jolts and his tail seems to rise whenever he doesn't move. I researched and it's either a bacterial or parasite infection. I have Melafix, what do you recommend I do?