I just got a couple of non HD Hydra 26's and would like to have more control over them. Since I'm finding it hard to come by an AI controller since they are no longer being sold. I know the Apex VDM can control it, does that need to be added to an Apex system or can it be a stand alone unit that I can throw on my tank? I'm pretty sure it needs to be in the system but I can't find the answer.

