Aquariums and Fish Keeping

First of all, you need to determine your triggers. These are likely too much light and/or too much nutrients. Is it a planted tank? One of the first things I did for this issue was to add more plants!

As for what you can do beyond triggers, a good clean up crew helps a lot. I don't have to worry much about any algae thanks to my team of mystery, nerite, rabbit snails in addition to some Hillstream Loaches and Siamese algae eaters.

I also use the twirl technique for longer strings of hair algae, easy clean up!