Also if your light bulbs are over a year old, you may want to swap them out. You don't need to get super fancy for Ferns and Swords but it's an opportunity to get the correct bulbs for your fixture and plants.
UV output drops in older light bulbs AFAIK.
Put lights on a timer. Don't run lights more than 8 hours a day and if you have Algae, drop it to 6 hours a day and increase water changes and check water tests.
Algae is caused by
Too much light or
Overfeeding or
Not enough PWCs or
Water chemistry out of balance.
A balanced tank has very little algae. You just have to find the combo of Light/Ferts/PWCs that works for you. Since you have Low Light that simplifies it.
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