I'm sorry I am going to have to disagree. If you add buffers to boost your PH without first addressing the issue of the extremely high ammonia levels you will increase the PH to a level where the ammonia will become toxic. Throwing more and more addatives and buffers and whatnot will not help. Removing what causes the extreme ammonia load and what is releasing the acidic ions slowly and over time while allowing the bacterial colony to slowly deal with the ammonia that is not removed during frequent water changes is the only safe way to level out the tank. Adding anything at all to boost the PH is a very very bad idea when PH levels are currently keeping the extreme ammounts of ammonia from being toxic. There is not a quick fix. Frequent small water changes and making sure that as many of the excessive organics that are breaking down in the water are removed is the only safe way without blowing the ammonia issue... the tank may re-cycle and theres not moch that can be done about that since he already damaged his bacterial colony. It's just going to be a time thing till it gets stabilised. Once stabilised then he can begin to buffer his water and perform regular maintenance to prevent this issue from happening in the future.