Algae is nature’s way of purifying water and grows when there is an abundance of nutrients (from fish waste, uneaten food, plant debris, etc.) and light. To keep algae to a minimum, provide proper filtration, feed your fish sparingly, do frequent but small partial water exchanges and avoid excessive light from windows or leaving the aquarium light on too long. Algae eating fish like plecostomus, otocinclus and flying foxes will also help keep algae under control. Watch our short video on the 3 Tips to Succeed to learn about the key tips we recommend in fishkeeping.