That first one is a T5HO (they left out the HO
part) but if you click the replacement lamps link, it shows 18w T5HO bulbs. I don't think they make Nova Extreme Pros that are regular T5.
Its not enough watts though, IMO
, even being t5HO. It is going to be hard to light your tank enough for a reef, since its a hex tank. The first link for the fixture is around $300 and MH
wouldn't be much more (if any more)...plus you'd know you have enough light to keep what corals you want. Just keep in mind that heat could be an issue with MH
, but its a worth it risk IMO
edit: Found this on aquacave.com: http://www.aquacave.com/detail.aspx?ID=2026
Its an ice cap pendant that accepts 250w and 400w bulbs...you'd have to hang it somehow but that price is good....just need a bulb which is what, $100 or less more. Not a bad deal, if that one is good.