Could be diatoms, are you running CO2 on this tank? How much light is over it? Do you dose ferts? People will be able to help you out a little better if you give a little more information.
I'm currently dealing with some type of algea in my 10 gallon, this it's due to lack of CO2 and new high lights I just added.
Planted tanks need 3 essential ingredients, light, CO2 and fertilzers. Depending on how much light you have over the tank will determine whether or not you need to inject CO2, or where it's such a small tank (5 gallons), you could get by with Seachem Excel if the lights not too high. It will also determine how much ferts you need to dose. |