hey there i have a random question. i happened to see you've had harlequin rasboras, and i'm looking into possibly getting some, but i was wondering, did they reproduce a lot??? cause if they're anything like guppies its not gonna work haha.
I used spring water and 1/4 of the water from the old tank I had him in(1/2 gal.cube) When I got him yesterday, he had food at the bottom of his cup, I had offered him food throughout the day removing it after 30 minutes of him not touching it. Same thing again today. I think that its where I'm getting the fish from.
Kill Bill for life. Also, I'm not sure what could have effected your fish as there are a million factors to consider; it could be something in your water supply, something you may have cleaned the tank or decorations with, or even just a bad fish from the store. Perhaps start a thread about it and see what the community has to say.