Does he eat ? ammonia burn maybe ? how long have your tank been setup ? what was the tank's occupant before the ray ? for how long ?
If you don't have enough beneficial bacteria, the bio load from a single ray can trigger a mini cycle. Not enough to show on test kit, not enough to kill, but just enough to trigger a burn.
stan
If you don't have enough beneficial bacteria, the bio load from a single ray can trigger a mini cycle. Not enough to show on test kit, not enough to kill, but just enough to trigger a burn.
stan
