Newbie Help

[md14]

Hi,

So I got an existing 55gallon freshwater setup, that i'm looking to convert to a SW setup.

It's not drilled and does not have a sump system of any kind. I know it is possible to do SW without a sump but in the long run am I going to regret this decision?

I have a R/O DI system, a Coralife Skimmer rated @ 125 currently as they were donated to me from a good friend. I know I need power heads good lighting, LR and i'm not going to be going with a DSB.

So aside from the lighting, LR, powerheads, and sand am I good equipment wise? (already heaters, and a refracto)

I also have a rena xp2 canister filter that I had for my FW setup I could also use..

But my main concern is just should I not even bother trying to use this 55gallon and just buy a new tank with a sump system?

Thanks alot

(i'm so confused)