Problem algae

[matt869]

My sister has a 35L tropical tank and has a massive problem with algae (see pic). I remove it and it comes back really quickly. Is there anything I can do to keep it at bay?

 

[shellieca]

How long are the lights on each day? Sometimes it's as simple as lessening the lights to 8 hrs.

 

[Mcor]

What fish has she got? How long are the lights left on every day? Is the tank near a window? There's a few things you can do. Firstly, cut down on the amount of time the lights are on (6hrs daily if its really bad, 8hrs max), or, get an algae eater. I got me a pair of bristlenose plecos in mine and they cleaned the tank top to bottom in just two days. They do a stunning job keeping it looking clean and clear. Obviously adding more fish depends on how stocked the tank currently is. Hope that helps.