Nice & rare finding thru lfs! Pics?
It shoudlnt be that difficult to find info via net.
Whatever you do, avoid acidic and soft water. As far as salt, I personally added some salt, even marine salt. If memory serves, approx a leveled tablespoonful for 5G but do it gradually (Dissolve salt first before adding and add it gradually if you havnt done it yet). Only replace proportionate amt of salt removed during wc. Vegetation is welcomed as well as stacked rockwork.
3" is still small, try llive brine shrimp to initiate feeding then add Fz. mysids, zooplantons, cyclops, etc to their diets as they grow. You may even include small frys down the road.
Add few ghost shrimps to keep them active. They mostl likely constantly chase/hunt them. You will be amazed by their power of suction. Sometimes breaking ghost shrimp in half or cause enough damages for easy/tasty feast for all pipes...
Def lower water level a bit if there are even small openings on top.
Good Luck with rare treasures.
btw, would you mind posting $/ea?