Can you please help us figure out why our glo fish tetras are not surviving our tank transfers? We had 3 in a 5 gallon and as soon as we transfer them to our brand new 20 gallon they died. At first we thought it was the bubble wall making too much current - as we found all 3 inside a decoration dead. We have had our water tested every time before transferring and it’s perfect. So we turned off the bubble wall and had the water tested again- same thing, 3 new fish all three died over night. I don’t understand, as we acclimated them and made sure they were good before releasing them. And it’s weird because the first three were fine in their tiny tank, but died in the much bigger tank. The pet store cannot figure out what is wrong, and we are just looking for advice as we love tetras, they are our favorite fish, we love their personalities, but won’t buy more until we can figure this out. Any suggestions? We buy 3 at a time so they have a school to swim with, in hopes of buying more in a few weeks, but we can’t get the tank started up. I’ll send picture of our setup. The first pic is how we found one of the most recent dead fish, the other two were on the floor. The second pic is where we found all 3 inside that three dead. Thanks so much everyone.