no inverts before cycleing they'll die, they do help keep a tank healthy once the tanks ready, check for ammonia, nitrite, nitrate, and ph
. during the cycle process ammonia starts out very high which normally kills all fish, after a few days nitrite goes up, this is when i would add the damsels, and finally nitrates jump up at this time do a 25 percent water change. also check the salinty. protien skimmers are good for controling small organic matter from becoming nitrates, but not to nessacry unless you do corals, i vac my substrate once a monthe with my 20 percent water change, but there is much debate about vacumening. are you gonna use LR
. Corals need excellent water quality intense lighting, and good filtration, plus the puffer and lion probably wont work out lion eat inverts like shrimp not a coral but a common reef inhabitant, and puffers will munch on corals.