https://blendermarket.com/products/postshade-waterfx

Water Caustics on depth specific for Eevee are finally here. They are Smoothed Voronoi Based Caustics that goes in combination with the depth compound and that will add even more realism and features to your water scenes. They are strictly linked with water surface sharing vector coordinates trough a rewritten vector compound system.  The Voronoi System will technically works in Cycles too , but i strongly reccomend to use the Cast Shadow Caustics function integrated and specific for Cycles to achieve your best high quality result.  The Water Shader will fully support the shadow caustics usage if you setup the lights to be shadow caustics caster as well as the Water surface, and the objects in the scene as receivers.