Please help!!! I have a brand new cycled tank and I had a blue dwarf Gourami for a week before getting four cardinal tetras. They stayed very pale and 2 died within 48 hours. My tank is 20 gallon and the water is great. The gourami acted aggressive when I first put them in, but he had stopped, so when I returned the dead fish I got more, just to see if they would be less stressed as a group of six. Now he is bullying again and won't stop!!! I don't know what to do, wait the night and take them back tomorrow?? Gouramis are supposed to community fish with tetras, I'm so confused! I do have two filters running and an extra 10 gallon tank, but it has a couple hairline cracks so I can't risk putting water in it. Should I keep them in a bucket or something?? I'm SO so sad.