You could run 2 405's but that wouldn't be worth the price of the second 405. You'd prob save money by simply going with 1 405 and atleast 2 good powerheads. The live rock will be the bigger part of your "filtration". If you're going with 130g tank, you're gonna need 130-200 lbs of rock for proper filtration, prob 100 lbs in sand (not completely sure). Atleast 2 decent powerheads, (I'd go with 4.) In terms of lighting, to give you more options in terms of coral type and placement, I'd look into a 6-8 bulb t5 setup or if possible LED
. Some of the other equipment you'll want is a RO
unit, a decent water heater or two, a UV
sterilizer, possibly a HOB
filter for backup, a refractometer (for testing salinity) and a good master saltwater test kit. I believe that about it but I could be forgetting somethings. Oh and not everything I mentioned is 100% necessary.
sounds like a huge list but once together, salties are fairly simple to maintain IMO