I think it is due to the fast metabolism mixed in with a primitive design adapted from a salt water shark family, they produce a lot of urea plus they produce a lot of ammonia from their breathing and activity as well as the waste produced from their vast diets.
If you want more scientific and accurate detail then let me know and I will refer to one of my ray books as they describe it a bit better than that.
When a rays takes a dump in 300gals they can cloud the water at times!
They are also very active, the more active the fish, the more ammonia produced, they breath a lot of oxygen and the by product of breathing in fish is the production of ammonia. Most ray death stem from ammonia spikes in the aquarium leading to a ph reduction in turn slowing down the filter bacteria activity.
The ray diet is pretty protein heavy too.
If you want more scientific and accurate detail then let me know and I will refer to one of my ray books as they describe it a bit better than that.
When a rays takes a dump in 300gals they can cloud the water at times!
They are also very active, the more active the fish, the more ammonia produced, they breath a lot of oxygen and the by product of breathing in fish is the production of ammonia. Most ray death stem from ammonia spikes in the aquarium leading to a ph reduction in turn slowing down the filter bacteria activity.
The ray diet is pretty protein heavy too.