I am getting a custom starphire 40 gallon for ZOa's, Chalices and Euphyllia. I am going to be using a dimmable LED array for lighting and will have a sump. My question is how aggressive does the skimmer need to be? I have had a hard time in the SPS tank with ZOA's and I think it is because there is so little for them to feed on though I could be wrong. SO help an Acro nut out here