If your having GW issues get a UV. There's just so much upside to it. I have never had any issues with plants and I ran one 24/7 on two different tanks for years. If your dosing micros w/iron on a regular basis there won't be an issue.
Your water will be so clear you'll have to look twice to see if THERE is water, your fish will acclimate better and have less disease when their stressed and open to infection and you'll have more wiggle room with parameters and if you accidentally stir up the bottom. Many professional installers and aquascapers use them to avoid potential problems.