Slănic (Ialomița)  The Slănic (sometimes referred to as "Slănic de Gura Ocniței" or "Slănicul de Jos" to distinguish it from other rivers named "Slănic") is a left tributary of the river Ialomița in Romania. It discharges into the Ialomița in Comișani. Its length is and its basin size is .