newb question-pruning?

[da1jewfish]

what is the purpose of it?
how do you do it?
for chateo can't you just basically pull it apart?
I have chateo and halimeda

 

[ClamIAm]

If you're using macro for nutrient export, you need to remove some of it to remove the nutrients, or if it has just grown too much and is taking over something. Pulling off pieces of chaeto would be the way to do it.