Catch the swing before your corals do
A crash rarely announces itself—alkalinity drifts, a coral pales, and by the time you notice it's too late. Meta Reef's free reef parameter tracker charts every test and flags drift early, so your tank stays stable and your corals keep their color.
Trend charts, not just numbers
Every reading plots on a chart so you can see at a glance whether a parameter is steady, climbing, or crashing—the story a single test can never tell.
Target ranges per tank
Meta Reef suggests reef-safe ranges automatically and lets you tune them per tank. SPS, mixed, and softie tanks can each keep their own targets.
Out-of-range flags
Readings are graded good, watch, or out-of-range against your targets, so a drifting number gets your attention before it stresses livestock.
Quick logging
A streamlined quick-log enters your whole test panel in a few taps, right at the tank, from any phone or tablet.
Ideal reef tank parameter ranges
These are the reef-safe target ranges Meta Reef applies by default. They are a starting point, not gospel—stability within a range matters more than any exact number, and you can tune every target per tank.
The reef's buffer and the fastest-moving major parameter. Stability matters more than the exact number—swings stress SPS corals first.
Building block of coral skeletons. Works hand-in-hand with alkalinity and magnesium to drive growth.
Keeps calcium and alkalinity in solution. Low magnesium makes it nearly impossible to hold the other two steady.
Overall salt concentration (~1.025 sg). Corals and fish tolerate slow change but hate sudden shifts.
Drives metabolism. Consistency beats a perfect number—rapid swings are what cause trouble.
Reflects CO₂ and alkalinity balance. Naturally rises and falls over the day; watch the trend, not a single reading.
A nutrient, not a poison in small amounts. A little feeds corals and color; too much fuels algae; zero can bleach them.
The other key nutrient. Balanced with nitrate it supports color and growth; runaway phosphate feeds nuisance algae.
Toxic to livestock. Should read zero in an established tank—any spike signals a cycling issue or a die-off.
A cycling intermediate. Meaningful mainly in new tanks; should sit at zero once the biofilter matures.
Ranges shown are Meta Reef's default reef targets; the green band marks the safe window. Non-reef tank types (freshwater, planted, quarantine) start without auto-targets until you set your own.
Log your whole panel in seconds
Enter your full test panel in a few taps, right at the tank, from any phone. Meta Reef charts every reading and flags anything out of range automatically—no spreadsheets, no hardware, no waiting until you're back at the desk.
- One screen for every parameter
- Works offline at the tank
- Auto-graded against your targets
Parameter tracking FAQ
What are the ideal water parameters for a reef tank?
A common reef target set is: alkalinity 8–12 dKH, calcium 400–460 ppm, magnesium 1280–1400 ppm, salinity 34–36 ppt (~1.025 sg), temperature 76–80°F, pH 7.9–8.4, nitrate 1–10 ppm, phosphate 0.01–0.1 ppm, and ammonia and nitrite both at zero. Stability within these ranges matters more than hitting an exact number. Meta Reef applies these as default targets and lets you customize them per tank.
How often should I test my reef parameters?
Most reef keepers test alkalinity, calcium, and magnesium weekly, and nitrate and phosphate every week or two. New tanks test ammonia and nitrite more often while cycling. Temperature and salinity are usually checked daily or continuously. Logging each result in Meta Reef builds the trend line that reveals problems early.
Which reef parameter is most important to keep stable?
Alkalinity is often called the most important because it moves the fastest and corals—especially SPS—react quickly to swings. Keeping alkalinity stable, alongside calcium and magnesium, is the foundation of coral health. Trend charts make it easy to spot a slow rise or fall before it becomes a swing.
Do I need a controller or does manual testing work?
Manual test kits work perfectly. Just type your readings into Meta Reef and it handles the charting, targets, and alerts. There is no hardware to buy—though if you dose or run automation, you can log those readings too.
Can I set different target ranges for different tanks?
Yes. Each tank keeps its own target ranges. Meta Reef fills in sensible reef defaults based on the tank type, and you can override any parameter—useful when a frag tank, a mixed reef, and an SPS-dominant display all live on the same rack.
Start tracking your reef today
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