My reef tank is a few years old and when I originally started it I used the original filtration is came with and now a few years later I removed the sponges and just removed the bio balls because I wasn’t keeping them clean. I’m interested to see if it lowers my nitrates and helps or hurts I’m my tank. I don’t see it hurt the tank because I have live rock and sand in the tank still of course. And anything else I know it optional/not required. Anyone removed theirs and had success/noticed positive effects especially in a well established tank?