What is this?

[Grim-Reefer]

Brown thing in center

 

[paulace2372]

Thats a mojano anemone. they are a pain and will spawn all over your tank if you don't deal with it sooner rather than later. Joes juice or aiptasia x are pretty useful at getting rid of them.

 

[needmorecowbell]

Concentrated Kalkwasser in a syringe and lemon juice are good too.

 

[Grim-Reefer]

Pulled out rock carefully yet quickly enough it couldnt respoD then Used aip x and the lit the remains on fire. Rinsed area with scalding water. Put back in tank without hurting mushroo
S on rock. Hopefully is is gone. I just ha bought the rock so it came as a hitchhiker and hopefully didnt spread

 

[Krypt]

Kill it with fire! Lol, friend of mine did something similar with a blowtorch

 

[needmorecowbell]

I think everyone would like to do that lol.