I've heard the argument that a scrubber can be "too successful" at removing nitrate and phosphate. I agree that there is a potential that lots of green hair algae has the potential to remove something that corals depend on. Where that argument falls apart is that algae is 100% a tunable method of nutrient control. All you have to do is turn the algae lights down or have them on for less hours per day.
It's a really easy experiment. Go adjust your lighting down 20% in intensity or duration and see what happens. Maybe your tank would benefit from running your lights for only 4 or 6 hours a day. I would try that long before throwing the baby out with the bath water.
It's a really easy experiment. Go adjust your lighting down 20% in intensity or duration and see what happens. Maybe your tank would benefit from running your lights for only 4 or 6 hours a day. I would try that long before throwing the baby out with the bath water.