Lots of macro choices that are non invasive. Untilthen I have been fraggin some of my macros so if you want to give some a try let me know. I've got codium, 2 forms of gracilaria , red grape that are all good for the DT being slow to moderate growers and very low chance of going sexual. I also have chaeto, ulva and spider for a fuge (I keep mine in the tank in a breeder box , works great but I do have to cull often).