loss of color

Hi, I am hoping someone can offer me some advise. I have a 200 litre tank with some cardinal tetras, mollies and dwarf rainbow fish. All had been going fine untill a couple of days ago when I added two dwarf red gourami's. Initially one was very unfazed by the introduction the other went and...

My betta has been acting strange lately. He has been floating at the bottom of his bowl, not moving very much. He has also gotten way more pale and his fins have sort of clumped together... I went on 3 day vacation, and wasn't able to feed or change his water during that time. Before I left, I...