The concept is without debate, we all want to provide what is natural. (sales hat on sorry - This is why i distribute FM becuase they only use natural elements where possible)
Sales hat off again - The only issue you will have is that our tanks do not have billions of gallons of fresh filtered sea water passing through them daily removing all negative nutrients, we have a captive environment where the bad guys will lurk and linger and build up over time in your system and this is where they then become an issue to remove when things get out of control.
In your case, absolutley do not go down the full nutrient route.
BUT
I would get your PO4 in check and nitrates (please report back) and then if required address these naturally with the bacterial elements bak and bio
After this as you are interested in filter feeders it would be good to look into Ultra Sea Fan and ultra min-S in very small doses to bring out all the micro life you wish to maintain.
Lets start at the beginning though, and show us your readings as advised to take above using PO4 heat test especially.
I will then endeavour to find the most natural solution for your system
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