coraline sand

my sand it getting coraline algae all over it. at least the bigger peices are. ill try to get a pic. i always liked the look of a very clean white sandbed and i dont know if i should take some sand out or put new sand right ontop of the old?
suggestions?

 

its probably cyano, coraline is not known to grow on sand really

 

at first i thought it was but this is deff purple coraline its a mix of purple and pink

 

is it calcium-like or slimy

 

never really picked any up. i gotta do a water change tonight so ill take a pic and pick some up and see if it rubs off.

 

here it is

 

That does look like coraline. If you don't want it growing on your sand, use a finer grained sand. It shouldn't be able to grow on that.

 

Coralline will grow on sand of all sizes, the difference is that the smaller grain sand makes it more difficult to see and is easily stirred by your tank inhabitants.

What you have is a healthy looking tank. GuitarMan's advice will work if you do not want to see the coralline as you currently do --- as it grows on the smaller grain sand the sand is then easily shifted and the coralline is face down starved of light and the process repeats – you are generally left with “normal” appearing sand.

 

so would i put sand on top of this sand? or should i just leave it. i mean it looks ok

 

Doesn't that sum it up right there?

If you add more sand you can go over top - don't let the sand be too deep (no more than 1.5 inches, I stay at 1 inch or less myself).

If you like it just leave it - toss in same sand shifters with your cleaning crew and it will probably be well taken care of.