ReefDiary Feature
Reef Tank Parameter Tracker
A reef tank parameter tracker is the log of every test you run, plotted against the range you set for that tank. ReefDiary stores 30+ parameters, including trace elements, and charts the last 7, 30, or 90 days so a slow alkalinity slide is visible before the coral shows it.
Keilo · Published · Last updated
What a reef tank parameter tracker should record
Reef keepers usually test alkalinity more often than anything else, then calcium, magnesium, nitrate, phosphate, salinity, and pH. Trace elements show up on ICP reports and still need a home next to the weekly kit tests. A tracker that only stores a single “latest reading” forces you to remember the week before.
ReefDiary keeps a history per parameter and per tank. You set the range that matches the system — SPS, mixed reef, or a softer tank — and the chart marks when a result leaves that band. The same screen switches between 7-day, 30-day, and 90-day windows, or the full history.
Ranges, alerts, and more than one tank
A number is only useful next to the range you actually run. ReefDiary stores custom ranges on the tank, not one global “ideal reef” copied onto every system. Alerts fire when a logged result drifts outside that range.
Hobbyist plans cover a personal tank. Serious Reefer adds more aquariums, trend charts, and target ranges. Enterprise is the shop tier, for staff who log customer systems as well as their own. Live prices stay on the signup and enterprise pages, because Admin pricing is the catalog of record.
Connected to dosing, ICP, and the rest of the log
Parameter history is more useful when a dose or a water change sits on the same timeline. ReefDiary links dosing entries to the parameter they target, and an uploaded ICP PDF can write parsed values into that same history instead of living as a separate file.
That is the difference from a spreadsheet tab per element. When alkalinity drops, you can see the doses, the last ICP magnesium, and the water-change note without opening three apps.
A practical cadence
Most mixed reefs do not need every element tested every day. Alkalinity moves fastest, so it is the one to log most often. Calcium and magnesium can sit on a slower rhythm. Nitrate, phosphate, and salinity belong on a schedule you can actually keep, not a checklist you abandon in week three.
The 7-day chart is for “what changed this week.” The 30-day chart is for a slow slide. The 90-day chart is for the question you ask after a salt mix change or a new dosing routine: did the tank’s normal range actually move? ReefDiary stores the readings either way. The window is just a filter on that history.
Common questions
How many parameters can I track?
ReefDiary tracks 30+ parameters, including common reef kits and trace elements, with custom ranges on each tank.
Can I chart 7, 30, and 90 days?
Yes. The parameter screen filters readings to 7 days, 30 days, 90 days, or the full history.
Does this replace an ICP test?
No. Home kits and lab ICP measure different things. The tracker is where both kinds of results can sit on one chart. ICP PDFs can be uploaded and parsed into that history.