Neptune Systems Trident
Neptune Systems
An automatic titration machine for the big three: the Trident samples tank water on a schedule and tests alkalinity, calcium, and magnesium itself, reporting to the Apex several times a day.
Why it mattered
Alkalinity testing was the hobby's daily chore and its most-skipped one. Announced to the hobby at MACNA 2017 and finally on sale in May 2019 at $599, the Trident removed the human from the loop: a pump draws about 8 mL of water, reagents titrate it, and an optical sensor reads the endpoint.
The default schedule — four alkalinity tests and two each of calcium and magnesium daily, at roughly nine cents a test — turned single readings into trend lines. A dosing pump failure or a hungry coral colony shows up in the graph before it shows up in the corals.
Paired with the DOS dosing system, the Trident closed the loop entirely: test results steer dosing automatically within safety limits. It required an Apex to run, which made it both an ecosystem lock-in and the clearest demonstration of what the ecosystem was for.
Key specs
- Went on sale May 2019; $599 launch price
- Tests alkalinity (±0.05 dKH), calcium and magnesium (±15 ppm)
- Default: 4 alk / 2 Ca / 2 Mg tests per day; ~7 min per test
- About 8 mL sample per test; waste goes to a container or drain
- Requires Apex or Apex EL; reagents last about a month per set
Keeper notes
- Owners describe the trend graph as the real product — drift gets caught days before a manual tester would notice.
- Reagent cost and the periodic internal servicing are the accepted taxes of ownership.
- Because it needs an Apex, keepers call it the purchase that commits you to the Neptune ecosystem for good.