So heres the story. My friend is getting married and they want to have goldfish in vases at each table. So they got a 30 gallon tank and are keeping about 30 of your standard gold fish in there. The problem is that each time we add fish about 4 of them die a night till they all go away. dont know whats causing this. we quarantined fish in other tanks and they dont die we add them to the big tank where were keeping them till the wedding and bam they die. all the water levels are normal on the water test. If you want more specifics let me know. there is no visible signs for why the fish would be dying. the water temp is being kept in the low 70s. any ideas on why these fish keep on dying? The fish are the cheap feeder gold fish, in case you wanted to know. Any ideas on whats wrong
