I have steped up the water change regimine from once a week to every 3 days. I do feed them heavy so that is the way to go. I clean out the filters about every three weeks with tanks water. No all at once but thoughout a period.
Guess I was just kind of nervous about how they were acting but they did both lose a life long tank companion so maybe that is why I noticed a change in the behavior, not cuase of the water.
But everything is going good now and they are both doing better and acting more like rays should.