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Methodology: ICP-OES, photometric and electrochemical methods specific for seawater. Further methods possible via upgrades.
Recommended values are optimized for coral reef aquariums.
Sample ID: 20891510 Ion balance of the analysis
Analysis ID: 324065
-5 %
+5 %
Booked upgrades: non
-8 %
+8 %
Sampling Point: 25g lagoon 2,1 %
Volume in Liters: 95 Slight cation excess / anion deficiency
Sampling Date: 08-31-2026 Plausibility check of measured values passed
Sample Arrival: 09-07-2026
To the dosing and action recommendations
PHYSICAL-CHEMICAL BASIC VALUES
measured Reference Range
Electrical Conductivity (mS/cm 25 C)°
53,8 51,7 - 53,0 - 54,5
Density (kg/Liter, calculated 25 C)°
1,0237 1,022 - 1,023 - 1,024
Relative Density (calculated 25 C)°
1,0268 1,026- 1,027
Salinity (psu, calculated)
35,5 34 - 35 - 36
pH Value 7,92 7,9 - 8,3 - 8,4
Alkalinity ( dKH)°
8,2 6,5 - 7,3 - 8,5
CO2 Content (mg/l)
1,12 0,04- 2,5
Alkalinity pH 4.3 (mmol/L)
2,93 2,3 - 2,58 - 3,0
Smell none none
Color colorless colorless
MACROELEMENTS, CALCIUM BALANCE ELEMENTS AND HALOGENS in mg/Liter
measured Reference Range rel. 35 psu
Sodium Na 11207 9500- 10700 -11500 11046
Sulfur S 740 850 - 900 - 950 729
Sulfate 2217 2550 - 2700 - 2850 2185
SO42-
Potassium K 434 380 - 395 - 420 428
Boron B 6,41 3,8 - 4,5 - 5,5 6,32
Magnesium Mg 1385 1200 - 1350 - 1450 1365
Calcium Ca 413 400 - 425 - 440 407
Strontium Sr 10,3 6,5 - 8,0 - 9,0 10,15
Cl-
Chloride 19780 18700- 19500 -20300 19496
Bromine (total bromine, ICP-OES)
Br 46,4 55 - 67 - 75 45,7
F-
Fluoride 0,13 0,9 - 1,3 - 1,6 0,13
Iodine (Total Iodine, ICP-OES)
I 0,041 0,055 - 0,065 - 0,080 0,041
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RELATION VALUES OF MACROELEMENTS AND HALOGENS
measured Reference Range
Salinity Meas. : Target Value Sal. 1,01 0,97 - 1,00 - 1,03
KH Measurement : Target Value KH 1,13 0,90 - 1,00 - 1,17
Magnesium : Salinity Mg 39 33,3 - 38,6 - 42,6
Calcium : Salinity Ca 11,6 11,1 - 12,1 - 12,9
Strontium: Salinity Sr 0,29 0,18 - 0,23 - 0,26
Potassium : Salinity K 12,2 10,6 - 11,3 - 12,4
Boron : Salinity B 0,18 0,11 - 0,13 - 0,16
Cl-
Chloride : Salinity 557 519 - 557 - 597
SO4
2-
Sulfate : Salinity 62,4 71 - 77 - 84
Chloride : Sulfate 8,92 6,6 - 7,2 - 8,0
Cl-/SO4
2-
Magnesium : Calcium Mg/Ca 3,35 2,7 - 3,2 - 3,6
Calcium : Strontium Ca/Sr 40,1 44 - 53 - 68
Bromine : Fluoride 356,9 34 - 52 - 83
Br-/F-
Fluoride : Iodine 3,1 11 - 20 - 29
F-/I
Sal. KH Mg Ca Sr K
Ideal Line
Relation Values
Fluoride : Sulfur : Strontium FSS 68,8 80 - 100 - 120
MACRO NUTRIENTS in mg/Liter
measured Reference Range
NO3-
Nitrate 0,6 1- 10
NO2-
Nitrite n.d. n.d.- 0,15
Phosphorus (ICP-OES)
P 0,002 0,006- 0,060
Total Phosphate (calculated) PO43-
tot.
0,006 0,02- 0,18
ortho-Phosphate (photometric) PO43-
0,006 0,02- 0,10
NO3 PO4-tot. PO4
Silicon Si 0,24 0,1- 0,2
Ideal Line
Silicate (calculated) SiO2
0,52 0,2- 0,4
Measurement Values
ORGANIC FACTORS
measured Reference Range
NO3
-/PO43-
Nitrate : ortho-Phosphate 93,33 90- 110
PO43-
tot./PO43-
Total Phosphate : ortho-Phosphate 1 1,00
PO43-/I
Total Phosphate : Iodine 0,15 0,13- 1,67
SAK254 (m-1)
not measured only with SAK254 upgrade
NPOC (mg/l)
C not measured only with organic upgrade
TNb (mg/l)
N not measured only with organic upgrade
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Dynamic Elements in µg/Liter
measured Reference Range
Zinc Zn 4,53 3 - 5,5 - 8
Vanadium V n.d. 2 - 6 - 10
Copper Cu n.d. 2 - 4 - 6
Nickel Ni 3,36 3 - 4,5 - 6
Molybdenum Mo 24,5 10 - 15 - 20
PHYSIOLOGICALLY RELEVANT TRACE ELEMENTS in µg/Liter
measured Reference Range
Barium Ba 35,8 5 50
- max.
Cobalt Co n.d. n.d. 1,9
- max.
Chromium Cr n.d. n.d. 2,3
- max.
Iron Fe n.d. n.d. 2,5
- max.
Lithium Li 64 180 350
- max.
Manganese Mn 61,7 n.d. 0,25
- max.
Selenium Se n.d. n.d. 2,0
- max.
only with ICP-MS upgrade:
Rubidium Rb not measured
OTHER TRACE ELEMENTS AND POTENTIAL POLLUTANTS in µg/Liter
measured Reference Range
Aluminum Al 1,5 5- 30
Antimony Sb n.d. n.d. 10
- max.
Arsenic As n.d. n.d.
Beryllium Be n.d. n.d.
Lead Pb n.d. n.d.
Cadmium Cd n.d. n.d.
Lanthanum La n.d. 2- 10
Mercury Hg n.d. n.d.
Silver Ag n.d. n.d. 10
- max.
Titanium Ti n.d. n.d.- 3,5
Tungsten W n.d. n.d. 30
- max.
Tin Sn n.d. n.d. 10
- max.
Zirconium Zr n.d. n.d.- 2,2
only with ICP-MS upgrade:
Cesium Cs not measured
Gallium Ga not measured
Hafnium Hf not measured
Neodymium Nd not measured
Tellurium Te not measured
Thorium Th not measured
Thallium Tl not measured
Uranium U not measured
Zn V Cu Ni Mo
Ideal Line
Measurem
