Soap-like bubbles in tank?? Help.
I have a 1.5 gallon desk tank with an anubia, some java moss, and some snails. Until yesterday, I had a sparkling gourami. He suddenly started listing around on the bottom. I did a major water change and he perked up slightly for a short time and then died. I took him out and now it's just the snails for livestock. This morning, I come in and my tank is filled with bubbles and bubbles are just rolling out of the filter. ??? It's a low-tech tank. I used Aqua Safe in the water yesterday - which I don't normally use on my tanks at home, but doubt it would cause this. I was planning on restocking the tank with shrimp, but now I'm concerned about the water quality. Is this a sign of anything?? How worried should I be? I don't have any test kits or anything here.