Kind of depends on what kind of algae you’re getting. I’m going to guess it’s green and easy to wipe off. Growing on the sides of the res.
if your res inside or outside. Is the container clear, opaque, or solid.
from my reefing and lab knowledge, algae needs two things to grow....nutrients and light. The latter is the easiest to control. Just wrap the container to eliminate light.
The nutrients is a little harder, so I’d need more info on the setup unless light is your main factor.