I don't know, sticky nitrates are the worst!!!
Just Kidding... The whole deal on wet/dries and Bio-Balls is they are not a good choice for a reef system as corals cannot (especially SPS) tolerate them very well, it effects the way they consume certain trace elements... If you have a "Fish Only" system, then a wet/dry may be fine as fish are not effected nearly as bad as corals by Nitrates... If you are keeping or planning on keeping a reef system, I would recommend converting the wet/dry into a usable sump which houses a
GOOD protein skimmer and maybe even a refugium...
Big D