"liquid" nutrients can feed the tissue as much as capturing "live" food. Or is it more "liquid" than "live".
Corals are omni-feeders to be sure – you know they are even known express chitonase on their skin so they can digest (e.g.) bug shells??!! So amazing.
But dissolved nutriets are known to first benefit the microbes such as their zooxanthellae, and secondarily benefit the host. This is why it's possible to over-do dissolved nutrients and bleach a coral. (Not too easy in a home setting as I've not seen it, but possible.)
Particulate nutrients are the opposite – they first benefit the coral host and the zooxanthellae sencondarily.