your ray just needs better water quality. As long as it’s still eating that’s the major thing. All of the water changes will not allow the beneficial bacteria to grow. Every time you do a water change add seachem prime and seachem stability. What I would do is do a big water change and add a lot of stability to increase the beneficial bacteria and leave it for about 3 days and then do another water change. Keep doing this until your filter can handle the bioload/ammonia the ray produces. But daily water changes will never allow the filter to cycle.
