Charts

Combined Parameter Trends · 15 Days

Each parameter is normalized to its ideal range — 0% = low end, 100% = high end. Hover for actual values.

Bridge readings older than 24 hours are summarized at 5-minute, 1-hour, and daily intervals to keep the chart fast. Manual entries are kept as-is; after your last manual reading the line carries forward dashed to today. Learn more

Individual Parameter Trends

Alkalinity 8.0–12.0 dKH

Calcium 380–450 ppm

Magnesium 1200–1400 ppm

Phosphate 0.01–0.03 ppm

Nitrate 1.0–10.0 ppm

Salinity 1.025–1.026 sg

Temperature 75.9–80.0 °F

pH 8.10–8.40

ORP 250–400 mV

Nitrite 0.0–0.1 ppm

Ammonia 0.00–0.02 ppm

Maintenance Schedule

↓ CSV

Weekly

▢Check salinity & temperature

▢Top off RO/DI reservoir if needed

▢Rinse or replace filter socks

▢Empty protein skimmer cup

▢Test Ammonia, Nitrite, Nitrate, Alk

▢Wipe front glass (magnetic scraper)

Bi-Weekly

▢10–15% water change

▢Clean skimmer neck

▢Check return pump flow

Monthly

▢Clean powerheads & circulation pumps

▢Rinse filter media (in old saltwater)

▢Check RO/DI TDS — replace if >2 ppm

▢Inspect fittings for salt creep

▢Trim chaeto in refugium if overgrown

Every 3–6 Months

▢Replace RO membrane & DI resin

▢Deep clean skimmer body

▢Check & calibrate heater

▢Inspect overflow & drain lines

Current Parameters

Alkalinity

8.3 dKH

8.0–12.0 dKH

Calcium

420 ppm

380–450 ppm

Magnesium

1310 ppm

1200–1400 ppm

Salinity

1.025 sg

1.025–1.026 sg

Temperature

78.4 °F

75.9–80.0 °F

8.22

8.1–8.4

Nitrate

8.0 ppm

1.0–10.0 ppm

Phosphate

0.11 ppm

0.01–0.03 ppm

Nitrite

0.0 ppm

0.0–0.1 ppm

Ammonia

0.00 ppm

0.0–0.02 ppm

ORP

— mV

250.0–400.0 mV

Parameter Ranges

Parameter	Target Range	Tolerable Range	Natural Ocean	Unit	Notes
Alkalinity dKH	8.0-12.0	7.0-13.0 dKH	7-8 dKH	dKH	🧪This is the #1 parameter that kills corals when it swings. Think of it as the skeleton-building ingredient. Dose consistently and test every day if you have SPS.
Calcium Ca²⁺	380-450	350-500 ppm	~400 ppm	ppm	🦴Calcium is literally what coral skeletons are made of. 420-440 ppm is the sweet spot — not too low (slow growth) or too high (chemistry gets weird).
Magnesium Mg²⁺	1200-1400	1150-1450 ppm	~1285 ppm	ppm	🔗Magnesium is the chemistry glue — it keeps calcium and alkalinity from fighting each other. Low mag = parameters that won't stay stable no matter what you dose.
Salinity	1.025-1.026	1.022-1.028 sg	1.025-1.027	sg	🧂Match the real ocean exactly — 1.025 SG. Your fish evolved for this. Even small swings stress them out. An ATO keeps it rock steady.
Temperature	75.9-80.0	74.0-82.0 °F	77-84°F	°F	🌡️Keep it like a warm beach day — 78°F is the sweet spot. Too cold and fish get sluggish. Too hot and oxygen drops fast.
pH	8.1-8.4	7.8-8.4	8.0-8.3		⚗️The ocean is slightly basic, and your tank should be too. pH naturally drops at night — open a window or run a refugium on a reverse cycle to keep it up.
Nitrate NO₃⁻	1.0-10.0	1.0-20.0 ppm	~1-5 ppm	ppm	🌿A little nitrate is actually good — corals and algae need it as food. The danger zone is above 20 ppm where nuisance algae explodes. Aim for 5-10 ppm.
Phosphate PO₄³⁻	0.01-0.03	0.01-0.1 ppm	~0.03 ppm	ppm	🎨Corals need tiny amounts of phosphate to look colorful. Zero phosphate = pale, stressed corals. Too much = algae takeover. 0.05-0.08 ppm is the sweet spot.
Nitrite NO₂⁻	0.0-0.1	0.0-0.5 ppm	~0 ppm	ppm	⚠️Nitrite is the middle step in the nitrogen cycle — toxic to fish gills. Should be zero in an established tank. If it spikes, something died or your cycle isn't done.
Ammonia NH₃	0.0-0.02	0.0-0.1 ppm	~0 ppm	ppm	☠️The most dangerous parameter. Even 0.25 ppm can kill fish within hours. Zero always. If you see any ammonia in an established tank, do a water change immediately.
ORP	250.0-400.0	200-450 mV	~400 mV	mV	⚡Oxidation reduction potential — a real-time proxy for water cleanliness. Healthy reef tanks sit 250–400 mV; lower hints at organic load building up (skimmer, GAC, water change). Probe drift is common; recalibrate quarterly.

Ranges reflect your settings. Customize in Settings