my point was that he fills from the tap and uses no conditioner! 99% of people would say thats a sure fire way to kill your fish but the rays are all perfectly healthy and huge too!
And in most cases that would be a sure fire way to kill rays, obviously your friend has 0 or near 0 mg/l of chlorine in his his tap water.
and what r u to judge him fail?lol you sir have certainly failed as a fiskeeper good thing u stick to hardy fish only wouldnt wanna see you keep discus!
Yes, I was side track when doing wc. usually they are uprightWont happen again
