Strange growth on kenya tree and zoas.

[Pippz]

I have a strange thing growning on my kenya ttee and one of my zoas . And my sand is becoming a a strange colour. Was doasing nopox for a while but stopped for about week. Al corals al doing greatly now , best ever imo . Except for my kenya and acans. The sand ussue went way and then i turn a rock around and now its worse than ever. Dont know if thats a mi i cycle , just thought id mention. Alk 9 , ph 8.2 , sal 1026. Po4 p.0 -0.1 . Dont have a more accurate test. Here is a pic of the growth.

 

[reef lover]

Will need a pic in white light.

 

[Pippz]

Sorry took so long eas a bit busy , here is a better picture. Sal 1.026 ,no4 5 , po4 0.1 temp 25.6, alk 8.4 ph 8.2 , have uv steralizer aswell

 

[reef lover]

Could be a sponge....but looks more coralish to me.
Most likely nothing to do with the algae in the sand.