It matters. Not all Gorgonians require the same care.
In this case you have purchased the non-photosynthetic
Diodogorgia nodulifera - a challenging species to maintain in captivity. It will need frequent feeding to survive. Use frozen HUFA enriched mysids or
Artemia (brine shrimp).
Better survivability can be obtained by purchasing photosynthetic Gorgonians.
Do not dose Iodine (or anything else) if you don't test for it.
In addition to alkalinity and calcium, with Gorgonians (in general) you should concern yourself with Mg levels.