Definitely looks like Ostropsis Ovata, they are mixotroghic and can live for months without light. Your in for a battle but it can be won, many have tried the reboot method only to have them come back.
There are 2 methods, the "clean method" and the "dirty method" , I subscribe to the dirty method.
Did you use an algae killer in your tank like AlgaeX?
Do you have a sand bed?
There are 2 methods, the "clean method" and the "dirty method" , I subscribe to the dirty method.
Did you use an algae killer in your tank like AlgaeX?
Do you have a sand bed?