Start of coralline?

[Dustinryan2010]

Does this look like the start of coralline growth? Tried to brush it with a toothbrush and it didn’t budge

 

[ndrwater]

If the green is what you are referring to, looks more like common Diatoms. If the purple on the sand is what you are talking about, then probably

 

[Dustinryan2010]

If the green is what you are referring to, looks more like common Diatoms. If the purple on the sand is what you are talking about, then probably

Sorry guess I should’ve been more specific, was referring to the small purple spot on the rock

 

[ndrwater]

Purple on the rock is Coraline. Good for you!!