i would have to agree; if it were the Osteoglossum species i would say go for it as it is worth a try if you are willing to take the risk. with Scleropages, however, (particularly that species) i would highly advise against it. jardini's are notorious for turning on tankmates, and will definitely bully gars...this is from firsthand experience as well as many other accounts i've been able to personally observe.
this is not a combo that is advisable if you want to keep the best interests of the gar in mind, although like so many other threads of this nature, it seems like people poll the members but still end up trying the combos 9/10 times. proceed at own risk--
--solomon