Thanks for that, BlueandKim, I can tell you, the Amazon Chain Sword does not look happy at all. Most of its leaves are a brown holey mess.
This brown algae is really $^& me off! I do have another thread floating around somewhere discussing it, actually posted in it earlier. I've tried most of the suggestions, someone suggested I might have too many phosphates in the water so I got a test kit, it was 2ppm, which apparently isn't ideal so they told me to get phosozorb, which I couldn't find at the LFS, so don't have any of that yet. I checked my lighting it appears to be sufficient, so someone told me, (maybe its time for a bulb change??) and also have been trying adding Flourish Excell, and it still looks like it does in those pictures, perhaps even worse, theres a fair amount of that fluffy black algae now, Black beard is it??
I'm just about ready to tear the tank apart and start again. BUT I will try putting in the fert balls first...