What is this

[13jake]

this showed up in my tank anyone know what it is

 

[Bradsreeeftank]

Is it dark green? Then it's bubble algea, which is very bad. You half too roll them off without popping bubble or take the rock out and boil
Let me no if you need help with something

 

[13jake]

No it's whiteish clear

 

[Bradsreeeftank]

Wierd, not sure then