Neptune has not yet revealed the official maintenance program. They discussed it around the time of Trident launch, but said it would not be required until after 18-24 months of use. It's now been 16 months since launch day, so I'd expect them to announce the plan soon.
Here's a quote from the
Trident FAQ:
What are the maintenance and service needs for the Trident?
Like most aquarium devices, regular preventative maintenance is recommended so they perform as designed and have as long a lifespan as possible. The Trident is no different in this respect.
We recommend that the Trident have a routine service of a small number of its parts in the window of 18-24 months. And, while we will have a kit available for customers to do this maintenance themselves, we strongly suggest that the Trident be sent in to our service center to have this performed.
All of the particulars relating to this recommended maintenance will be released at a later time, but at this time we can say that the parts kit to do it yourself will be less than $100 and we are targeting between $150-$200 if sent in to be completed by our service technicians. In addition to these cost estimates, the service completed by Neptune Systems will have several pricing options including an advanced replacement option.