I definitely think its alright to try it. Great biofilter doesn't hurt plants, as shown by many people having success with great filters on many types of tanks. Gas exchange, as mentioned, is a plus with no CO2
When you get around to checking his stuff, find out how quickly water returns from the wet/dry. If it used to be a reef tank you may need to turn down flow, or want a Thoene-style loach river tank (loaches.com). If whoever feeds checks the overflows at the same time, it will probably be enough to avoid complete blockage. ime
sponges (and pantyhose) get complete blockage much too easily in planted tanks, and window mesh or notches/"teeth" work great when the drain diameter is oversized compared to return rate (weekly maint. or less).