Okay, long story short I chose to get some Kribensis for my 40 gallon and went to the pet store planning to get a school of 6 zebra danios and one opaline gourami but my mom picked out four platies, a swordtail, my zebra danios, a female opaline gourami, and two mysterious tetras with red tails. I got them home and they've all been doing well and I think the cycle has completed (I started it before I purchased test kits) I went to feed them sparingly the next day my freeze dried tubifex cubes to get the shy fish to come out. My mom got tired of how long it was taking and put the whole cube in the tank. Now I had bloated fish and I was frantically monitoring the water. Today I come home and there are three more skirt tetras, two paradise gouramis, and a dead angelfish from Walmart in my tank. My mom fed them again and now my danios are sick and the water showing traces of ammonia. I dosed the aquarium with stability and Prime and then went on a mission to find out what happened. The Opaline gourami apparently had bullied the sick angelfish to death and went after the weak paradise gouramis. I immediately came to their rescue and isolated the Opaline gourami. I can't take them back because Walmart won't accept them and my fish are expendable to the rest of family. The two paradise gouramis have regained some strength and started swimming around showing no aggression towards each other. Could the three gouramis live in harmony? How long should I isolate the Opaline before trying to reintroduce him? I am planning on getting more plants to disperse aggression but is there still a chance I can get the Kribensis I had planned or is it not possible with my unexpected new arrivals? How long should I wait to feed them again after being so bloated from too much food? (Pics coming)