Will the window light cause me an algae problem?
I recently bought a 180 l/20 gal Juwel bow-fronted fish tank. Due to the position of the windows in my living room, the sunlight will catch a quarter of the tank in the evening. Will this cause an algae problem? should I fit blinds to the window? PETER STACK, EMAIL
BOB says: Algae needs three key things to thrive: light, water and nutrients. Too much natural daylight can cause problems, so siting a tank away from direct sunshine is usually a good idea (although sometimes you get to see your fish in a literal ‘new light’ when they are bathed in sunshine).
However, if you have plenty of plant growth in the tank then the algae often can’t compete for light or nutrients, so it won’t be a major issue, apart from perhaps on the front glass which is simple to remove with a soft sponge scourer.
If this fails, then making sure you have a regular light period of six to eight hours and keeping the blinds drawn will help.