Algae stuff growing on my plants and gravel??

[FlareBettaGuy]

There is stuff growing on my plants and gravel. It is red. For a better description and pictures, go to http/fish.orbust.net/forums/index.php?sh...showtopic=18226

What is it? How do I get rid of it without using chemicals? Will it kill off my beneficial bacteria? Any other info about this? Thanks!