Purple sponge looking stuff

[guy fawkes]

Could anyone enlighten me as to what this might be

 

[cloak]

Just a harmless purple sponge. No worries.

 

[guy fawkes]

Nice!

Thank you

 

[Randy Holmes-Farley Verified Community Expert]

I like those sorts of sponges and I encourage them in various ways, such as dosing organic carbon (which turns into bacteria that they may eat) and by dosing silicate for them.

 

[Wiz]

I have a big piece of it growin in the back of my rockwork. Bout 3"x4". Really nice looking. I love it