I will link academic research that shows diversity of feeding strategies increases survival of species. The research does not suggest, it documents a high level of feeding on DOM/DOC and during seasonal fluctuations when these levels are not high, switching feeding strategies to phytoplankton.
However, each species should be viewed separately to detail what each species feeds on. Because I am a simple person, I focus on the ecosystems that supports ornamental sponges and then,
I emulate Nature and provide diversity of micro fauna & fana.
Angel Cegarra captures this sentiment in his book
Reefkeeping Fundamentals which was published March 23, 2023. Chapter 1 Introduction on “Biology and Nutrients page 14 on the third paragraph reads:
“The organisms that inhabit coral reefs have evolved together for millions of years, so that their feeding habits are completely intertwined. Reefs are habitats with extraordinary stable environmental conditions throughout geologic time. This stability has favored the evolution of hundreds of thousands of species over millions of years, producing an unimaginable explosion of biodiversity.”