I have a well setuped planted tank. Recently, I found there was some brown
thing cover the amazon sword and water sprite. The other plants don't have
problem. It is slime and quite hard to get rid of mechnically. I am not sure
if it is brown algae. How to get rid of it? BTW, there is also green dot
algae in my tank.

My tank setup:
46g bow front. 2x65w CF/10 hour/day, Eheim 2213 and Penguin 330 filter, RO
water, DIY CO2, heavily planted.