Kappa-carrageenan hydrogels spontaneously release fluid (syneresis) under certain elasticity conditions,which depend on the temperature, the salt concentration in the gel (KCl) and the polysaccharide con-centration. Strong and weak gels exhibit notably weak syneresis properties. The maximum syneresiswas found at intermediate elasticity where the gel was neither strong nor weak. The variation in the gelcomposition indicated that the fluid is released according to the thermal retraction coefficient, whichdepends on the elasticity. Experiments revealed a dynamic equilibrium of the syneresis process wheresyneresis fluid was not withdrawn. However, once the fluid was removed from the gel surface, the releaseof solvent starts again if the elasticity is below the compressive pressure in the gel. Therefore, swellingof the gel is suggested as an explanation for the dynamic equilibrium of the syneresis process.