no my tank is not in direct sunlight, or any type of sunlight for that matter at any time of the day. erm my light is on 10 hours (12 midday til 10pm) and off 14 hours.
i cant put frogbit in the tank, i have tried it as i have loads, the power of the fx5 just chucks it all over the place and it breaks up! i have loads of plants, id say about 75% of the 240 liter tank is full of plants and i have never ever had any kind of visible algae in the tank before! coming to think about it i had a bit of algae on the front and back a few days ago, so its all happened recently, but i havent changed anything, i havent added or taken anything away

i shall visit the lft later on this week n see if he has that interpet hair algae stuff.
any other suggestions will be greatly appreciated as if its not gone soon ima rip every single thing out of the tank and replace it as its horrible!!
cheers, David