Can't Remember, this is normal right?

hig789 · Jul 29, 2015

I've had a few tanks in the past but I don't remember having coralline below the sand bed on the glass. Pretty much all around the top 1/2" of my sand bed is starting to grow green coralline. My rock came from a established tank so there's already plenty present on them. Just making sure this is normal or if I have something else going on.

twilliard · Jul 29, 2015

I'm sorry but what I see is not coraline algae

hig789 · Jul 29, 2015

Come and scrape it off then. Haha. Takes a credit card to get it off the acrylic above the sand bed.

hig789 · Jul 29, 2015

I have no clue what it is if it's not coralline then. Almost all grows in circles like coralline does. It doesn't look like it in the pics because I have tried to scraped it off a few times

Tahoe61 · Jul 30, 2015

1st image looks like Coralline the other images look like Cyanobacteria that likes to grow in areas of low oxygenation.

hig789 · Jul 30, 2015

Tahoe61 said:
1st image looks like Coralline the other images look like Cyanobacteria that likes to grow in areas of low oxygenation.

Well it all feels the same when I'm scraping it off. The weird thing is that there's lots of flow where the second two pictures are at. The first pic is directly below my mp10.

This is right where the mp10 bounces off the other side of my nano. It didn't show up in the pic but there's already spots of coralline coming back where I scraped it off above the spot below the sand.