It sounds like a reef tank is what you're working toward here rather than a FO
. I would not recommend a wet/dry for that application. They tend to produce nitrates in large quantities. We need some more info before we can advise you on what to do next.
How much live rock do you have?
How much lighting do you have? Wattage and color.
What kind of substrate are you using?
What are your water parameters?
pH, temp, salinity, ammonia, nitrite, nitrate, calcium, alkalinity.
What kind of skimmer do you have?
Please describe the water movement in the tank...how many powerheads?