Some new info. In case you cannot see it with the link:
Anyway I float the bag with the fish in the tank for about 30 minutes. The danios from what I could tell were leaving him alone. They would pretty much just interact with each other.
Anyway got my water tested at petco, they said it was good. I bought a test kit and tested it when I got home, I also got good results.
ammonia = 0ppm, nitrite = 0ppm, nitrate = 0ppm (ah might need to higher for the plants, don't have co2), pH = 8.2 (definately a little higher than I would like it, but unless Petsmart is using good water it might be the same)
Send a pic via email of the fish with stringy poop, haha I definately will try. They don't like to sit still.
Tank size, what fish you have in the tank, previous fish that were in the tank.
It is a 10 gallon tank. I've had it running for a little over a year. Before I had some platy in the tank. When they died I let the tank sit for a couple of months without fish, just in case there was something the platys had. March of last year I got the 3 danios (not sure what type they are) but they are an inch at most. I haven't added any fish until this gourami about a week ago. Still some stringy poop, so I got some meds and medicated fish food for them, since they are still eating.