Many big systems run with large amounts of LR in a sump or even remote sumps.... i know a guy who has arouns 500lbs of LR in his sump but also placed a 3in base of eggcrate so the detritus would go to the floor. This was so when he did water changes he then switches the flow from to supplying the DT to flowing into the remote sump with LR that has a bulkhead at the 3in base where the eggcrate is...wich creates a vaccum empting into his basement drain.
But yea i dont see negatives if maintained.
So whens the sargasum doing a photoshoot?