Actually I think that it could work although in a much bigger tank, I don't like that different species of anemones that he has mixed as that is usually a disaster. One of the things though that would and could possibly ease tensions is the fact that there are so many anemones and each clown picks one and defends it. This would reduce a bit of aggression cause in the natural state of things on the reef clowns will vary rarely leave farther then a foot of 2 from the anemone in which they host. so in a larger tank I can see something like this as a possibility to to the lack of interaction during most of the photo period between the different species of clowns. The set up he has now is most likely going to be a disaster in the end if A. anemones start to die off and clowns fight for a symbiont or there is an unseen death that spikes the water parameters and causes mass death due to over population which will crash the tank and once anemones start to die off that is a big mess.....I am still getting over an anemone death that didn't go noticed until 2 days after the anemone crawled into the rock work and began to melt.....I think that has been the lead to some of my algae problems.....