Assuming you what to feed them together? First and foremost, are your hens suffering from coccidiosis? If they are, than adding Corid to the water is very important and fast! You don't want to feed electrolytes when feeding Corid since it reduces the affect of the Corid.
If your hens are not affected by coccidiosis, it most commonly affects chicks, than its not nessasry. You don't need to feed Corid daily. They will likely develop an immunity and not need it. You can feed electrolytes daily though. Its not necessary unless they are suffering heat stress, cold stress, recovering from injury or disease, or stressed in general. Electrolytes are made to replace the salt they are loosing from stress.
Hope that helps!