Brown algae not green?

I am currently having a slight growing issue in my tank. Instead of a green algae as i'm used to seeing in my tank there is a brown colored algae growing on a rock in the middle and my sternella and queen pleco wont go near it. Any ideas why?

It looks to me like diatoms, but the pics are kind of blurry. If the algae is "dust-like", it's probably diatoms; however, if its stringy then you have some other sort of algae issue on your hands. Diatoms are common in a new aquarium, and are nothing to worry about. I don't know why the plecos won't go near them (but I'm not a pleco expert by any means). With a few water changes the diatoms will go away on their own. Just make sure that you keep up with your WCs and just be patient.

Ok thank you for your input. I will do further research if it continues to grow and Ill be sure to take care of those WCs

No problem. Does it look like dust/powder?

yup, just some algae that you commonly see from new cycling tanks.

Yeah my plecos took care of it, just took them a bit to get hungry for it

So I didnt want to start a new thread because I've got a diatom question. Aside from water chemistry and light, what promotes diatom algae to grow?

There's this one spot, about 4 inches in diameter at max, that's always a brown/orange. It's a bit oranger than I've seen any other diatoms in my tank, and I thought it might be a peice of metal or something rusting in the substrate. I've dug through it a few times to no avail. I chalked it up to diatoms and went on my way.

Now a few weeks later, while cleaning my tank, I realize that I always only clean diatoms off the right side of my tank. And it's always only in the corner that the spot is in.

My chems are fine and that corner isn't even where the food falls during feeding time. The current drags food to the left. I counted out light as well, since my light fixture runs all the way across my tank, not side specific. Also, the spot that turns brown/orange isn't fully exposed to the light since there's some limb from decor hovering over it.

Any ideas??

Hmmm...maybe it's a dead spot in your tank? Try redirecting your flow or adding another powerhead. I used to have the same thing happen (except that it was a patch of red slime) until I added another Koralia.