Algae on rocks, need advice

[NotoriousSway]

BN will help but not with all typed of algae.

I have notice that in one of my tanks I had some black hairy algae and the ABN pleco didn't eat it.
They do eat green and brown algae at a amazing rate. I had a tank covered in brown algae I put a 3" ABN pleco in it for a couple hours and came back and it was all gone. I don't know how that was even possible, he must have been pooping it out as fast as he was eating it.

 

[JamesRiggs]

Why would you want to get rid of the algae? Algae is great and the fish love to pick at it too!

 

[Scotty]

Hi Stingray, Algae is the most natural form of food for most fish, and especially the Lake Malawi cichlids. I have taken some of my F1 Labetropheus fuelleborni Katale to my Pet Shop and put a male and 2 females into my 1000l display tank. The rocks are green with algae. These three have grown to nearly double the size of the others in a tank where they are for sale. They spend most of the day eating off the rocks. Have even had them not bother when I fed the fish with the supplement food I use. I also believe it helps with the colouring of the fish. These three definitely display brighter colouring than the others.
Don't worry about the algae on the rocks. I believe it means your sysytem is working well. Green algae is good algae. As some have sais, scrape it off the glass.