Algae in Refugium

[Oscar]

I am working my way through Volume 3 of The Reef Aquarium (great book but heavy enough to press flowers) and came across a discussion of EcoSystem and Miracle Mud.

I now have a much better understanding of the process of using algae for filtering. What intrigued me was that the authors stated that the use of algae, and it's occasional trimming, eliminates the need for a protein skimmer.

So I would like to get some insight on what others are using in their sump refugia? Is this what chaeto is used for? Does it need to be rooted or does it simply float?

Anyone using a hang on filter box instead of a sump?

Also the EcoSystem product uses bioballs to break up detritus as it enters the sump. Is that necessary?

You can buy the EcoSystem sump package in Canada but it is pretty pricey especialy the Miracle Mud part and the fact that the mud needs to be replaced.

Thanks in advance