How to get rid of brown algae?
Hello, this is my first time posting on this website, so please excuse me for putting this in the wrong section.
Anyway, I have a 10 gallon aquarium. I started it around 3 months. It also has been fully cycled. I have 2 male guppies, 5 harlequin rasboras, and 1 otocinclus catfish. I used to have blue gravel, but about 3-4 weeks ago I wanted a more natural look, so I added sand. About 2 weeks ago, I noticed that there was brown algae growing only on the sand. But lately, it has been growing everywhere. My otocinclus is doing a great job, there just is so much, he can't handle it. Is there a way to get rid of this brown algae. I have a 20 watt light, on for about 10 hours a day. I do weekly,10-20% water changes.