Thanks for the tips! I do a 5 gallon water change every Sunday morning and have only missed it one time due to a trip!
That's perfect, but I would expect your tank to look a little better with regular water changes. This leads me to feel there is something else going on.
I would ask you to continue with weekly water changes. Also, I would suggest that you stop dosing.
If it were my tank, my goal would be to reset through water changes so you can get things leveled off. Then test and implement dosing based on the needs reflected in your tests.