RSS 2.0
Natural Seawater Mimicking
Login
Unknown user
Reference
Facebook
Alternative Picture
Topics - Reefkeeping
How do Deal with Low or High Seawater Chlorinity
[TEST] CS TEST Chlorinity
Chlorides Profi Plus 1 l
[MS] CS Marine Minerals 2 kg
CS Marine Minerals Calculator
Chlorinity - Salinity - Density
Cl- Calculator (Chlorides)

There are following main reasons of incorrect chlorinity in reef tanks: Use of poor-quality marine salt for seawater make-up; Use of chlorides as the calcium and magnesium additives; Evaporation.


Version 2012-III

How do Deal with Low or High Seawater Chlorinity

Introduction

Chlorinity

NaCl

The Chlorinity of seawater is defined as the total mass of halides expressed in chlorine equivalent. Chlorinity is determined by the Mohr-Knudsen titration, which however neglects fluorides, i.e. the consumption of titrant corresponds to total mass of following anions:

Anion Concentration in Natural Seawater
[g/l] [%]
Chloride (Cl-)
19,35733800 99,9997374
Iodide (I-)
0,00005076 0,0002622
Bromide (Br-)
0,00000007 0,0000003
Astatide (At-)
˜ 0 0

As flows from the table above, the results of any chlorinity test kit used in reefkeeping practice can be considered as solely chlorine-related, the other halides can be discounted.

Density - Chlorinity - Salinity Relation

T
ρ [kg/l]
Cl- [g/l]
S [‰]
25 °C
1,020 16,55 30,5
1,021 17,35 32,0
1,022 17,88 33,0
1,023 18,67 34,5
1,024 19,46 36,0
1,025 19,98 37,0
1,026 20,77 38,5
1,027 21,56 40,0
1,028 22,08 41,0
1,029 22,86 42,5

High and Low Concentration of Chlorides

There are following main reasons of incorrect chlorinity in reef tanks:

  • Use of poor-quality marine salt for seawater make-up
  • Use of chlorides as the calcium and magnesium additives
  • Evaporation

In both cases there are the solutions how to remedy the problem - simple one for low chlorinity and little bit more complicated for high chlorinity.

Determining of Chlorinity

Chlorinity of seawater is in relation to density (salinity). Therefore both parameters must be determined.

1 - Chlorinity

CHL 

Determine the chlorinity of your seawater sample with CS TEST Chlorinity.

2 - Density

 Refractometer

Determine the density or salinity of your seawater sample with suitable precise refractometer, salinometer or densitometer.

3 - Density versus Chlorinity

 CHlorinity Table

In the table above or in Operating Instructions of CS TEST Chlorinity find expected (i.e. required) chlorinity for the density (or salinity) of your sample.

Dealing with Low Chlorinity

Chlorides Dosing Calculator

Go to the Chlorides Dosing Calculator in Support menu section and enter:

  • required chlorinity matching the density of your sample
  • chlorinity determined with CS TEST Chlorinity kit
  • total volume of seawater in tested system
CHlorinity Table

Chlorinity must be entered in mg / l - i.e. the results of CS TEST Chlorinity in g / l must be multiplied by 1.000.

Cl- Profi Plus

Finally press the "Calculate" button to get the amount of Cl- Profi Plus in ml to be added into your tank.

Whatever is the calculated amount of Cl- Profi Plus, it shall be applied into the tank in more shots, even for more days.

Maximum recommended one-shot application is 1 liter of Cl- Profi Plus per 1.000 liters of seawater.

Chlorides

Dealing with High Chlorinity

TOPlist
Search
Contact us
Product Information
coral-shop
Bestsellers
Profi Plus Additives
Marine Line Additives
CS DispoPhos
Platinum Reef Additives
CS NitraClean
Test Kits
Animal Care Products
CS DeChlorAmm
Channel One Dosing
UM Removal Set
News
Most visited