My thoughts/ experience: First create some shady areas as well as bright areas. My chaeto does well on top of the water column (this also helps create little shady areas where pods
, sponge, and other little buggers thrive). would highly recommend 2-3 inches of sand over some figi/ miracle mud in there to help with nutrients for everything. I will never do a tank without mud again! You don't want too much water flow. There should be some very calm areas for little clouds of pods
to breed and swim. Think safe shady lagoon- well lit but diverse in every area.