I’ve had my 55 gallon cycled for a few months now with only four small starter fish in it. I have a fluval 406 and an AC 75 HOB attached and have had a huge problem with brown algae. It seems like within a week of cleaning there is already more brown algae forming on suction cups, my PH, the glass and worst of all the white sand giving my entire tank a dirty look. It’s driving me nuts as I really thought that with a 406 and my HOB I wouldn’t have to be cleaning algae this frequently. It’s to the point where I’m considering replacing my white sand with black sand. I know algae is inevitable but does anyone have any suggestions to curb this problem and slow the growth so I’m not having new brown algae form every single week?