Hi, i just got 3 more teugs, and one of them is having some serious issues, hes at the top of the tank completely lateral and its really weird. When he swims he wobbles side to side very erratically until he gets back up to the surface and just floats there like hes dead. Please help, im gong to add some salt to see if that helps, thats lots of aeration, and all the stats are 0 and nitrates are 10 ppm. This one came in a batch of three all individually packed and this one is the only showing problems.