This really depends upon the species. I have a thinner branched S. hysterix colony that thrives under all lighting and flow. Its skeleton is fragile and easy broken. I also have a very dense thick branched hot pink/purple specimin that Just sits there unless you hammer it with flow and intense lighting. It’s skeleton is extemely dense and strong.. Peoples experiences seems to vary greatly I believe due to two different species being involved – the histerix with the thin delecate brittle skeleton and fast growth under many different conditions and the other species (whose name escapes me, maybe pistala???) that is thick branched, slower growth and dense skeleton that requires intense light and tons of flow. I know when Calfo saw my thick/dense branched colony, a couple of years back, he said it would grow best right under the dump bucket of a mechanical surge device.
Hope this helps
Jake