Keep up the work with the hearing aid. At the very least it'll keep that side stimulated and reduce the rate of degeneration. Your HA may also provide you with other advantages (improved localisaton, pitch perception, speech understanding in noise, music perception) depending on the extent of your hearing loss. Visit the NAL website, they've got more information at the bottom of this page under the heading "hearing aids with cochlear implants."
The authors of some of the documents there also put together a protocol for balancing the volume of your hearing aid with your CI that you should get your audiologist to go through with you. It is available on request from Cochlear Ltd. or you could contact Teresa Ching at NAL. Getting the devices to work together can often make the difference between no and considerable benefits for bimodal (CI+HA aka electric + acoustic / two mode) hearing.
