Uglies

[Reef Life!!]

How long does the ugly stage usually last after cycle.

 

[KrisReef]

Forever, and then it will go away by itself afterwards.

 

[Glott3133]

It depends. How long has your tank been running? The ugly phase is caused by so many different things going on in your tank. CUC can help clean sand, rocks and glass, but you will see a variety of brown algae, green hair algae, and any number of different issues. They usually all pass as your tank goes through its processes.