AQUA-CHECK


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Water parameters and their meanings

If you look at the world‘s waters, where fish of all kind live, the specific water values are just as numerous as the fish living in them.
We want to present you the scope of some parameters which can be measured with AQUA-CHECK and AQUA-CHECK 2, and show you their specific meanings.

To make the subject of water values in aquariums a little more simple, we show you the scope of some parameters and their possible risks.
In the cited ranges, an appropriate keeping is usually possible (which does not mean that aberant conditions in the specific pool must be caused by wrong keeping etc.).

pH-Value
Nitrite
Nitrate
Ammonium
Silicon
Phosphate
Copper
Chlorine
Carbonate hardness
Total hardness
Iron
Fluoride
Oxygen

 

Meaning of the pH-value

pH-Value Meaning
lower than 6,0

dangerously low (aberances for the keeping of different kinds of fish possible)
Risks:
Toxicity of nitrite increases with sinking pH value
Recomended reaction:
Rising the pH-Value and stabilize the chalk-carbon dioxide balance (buffering system)

6,5 - 7,5

low (aberances for the keeping of different kinds of fish possible)
Risk:
Toxicity of nitrite increases with sinking pH value
Recomendations:
Raise the pH-Value and stabilize the chalk-carbon dioxide balance (buffering system)

7,5 - 8,5 Acceptable (aberances for the keeping of different kinds of fish possible)
no need to react
higher than 8,5 high (aberances for the keeping of different kinds of fish possible)
Risks:
Toxity of ammonia rises (creation of ammoniac)
Recommendation:
sink the pH-Value and stabilize the chalk-carbon dioxide balance (buffering system



Meaning of the nitrite-value

Nitrite-value Meaning
Up to 0,1mg/L

Acceptable
Recommendation:
Frequent checking of the nitrite value

0,1mg/L - 0,3mg/L

High
Risks:
becomes harmful especially in combination with a low pH-value (Creation of salpetric acid)
Recommendation:  
Sinking the amount of nitrite by immdiate use of microbiological products.

Higher than 0,3mg/L Very high
Risks:
Increased fish-toxicity and direct harm to organs
Recommendation:
Sink the amount of nitrite by exchanging the water with nitrite free water and treatment by microbiological products.
Important:
Regulation of the pH-value between 7.5 and 8.5



Meaning of the nitrate-value

Nitrate-Value Meaning
Up to 30mg/L

Acceptable
No need to react

Higher than 30mg/L

High
Risks:
Reduction of nitrate to nitrite with the specific risks of nitrite
Recommendation:
Sink the amount of nitrate by microbiological products.
Increase the frequency of changing water



The meaning of the ammonium-value

Ammonium-value Meaning
Up to 0,5mg/L

Acceptable
Recommendation:
Frequent checking the nitrite-value

0,5mg/L bis 1,5mg/L

High
Risks:
Espessially in combination with a high pH-value, the harm of ammonia for water animals rises.
Ammonia can be poisonous to fishes.
Recommendation:
Reduction of ammonia by using microbiological produts, or zeolite.

Higher than 1,5mg/L Very high
Risks:
Increased toxicity and direct harm to organs
Recommendation:
Sink the amount of ammonia by exchanging your water with
ammonia-free water and treatment with microbiological products or zeolite afterwards.
Ammonia can be poisonous to fishes.
Important: fixing the pH-value between 7.5 and 8.5



Meaning of the silicon-value

Silicon-value Meaning
No known limiting values

Raw- and filling water have different values of silicic acid.
Supply water can contain 5-20mg/L silicic acid calculated as SiO2.
A usual recommended value in aquaristics is under 1-3 mg/L SiO2
Risks:
Growth of diatoms.
Recommendation:
Sink the amount of silicon in your water by chemical binding or changing water with deionized water.

Calculating silicon to  silicondioxide (SiO2):
Measured silicon (Si) x 2,139 = … mg/L Silicondioxide (SiO2)



Meaning of the phosphate-value

Phosphate-value Meaning
Up to 0,035 mg/L

Acceptable
no need to react

Higher than 0,035 mg/L

High
Risks:
Rapid growth of algae, in result pH-value and Oxygen instability.
Recommendation:
Binding of phosphate by suitable products.



Meaning of the copper-value

Copper-value Meaning
Up to 0,1mg/L

Acceptable
Harmful to blue-green algae

0,1mg/L - 0,14mg/L

Acceptable
Risks:
harmful to small water organisms, depending on kind
Recommendation:
Depends on the purpose of the water.
In natural waters, possible decrease by copper binding products

0,14mg/L - 2,0mg/L Harmful to fish, depending on kind.
Recommendation:
Decrease through copper binding products
Higher than 2mg/L High
Risiko:

Toxicity
Recommendation:
Decreasing through copper binding products, possible water change



Meaning of the chlorine-value

Chlorine-value Meaning
Up to 0,1mg/L

Acceptable for usual water
No need to react

For swimming pools: too low
No disinfecting effect.

0,1mg/L - 0,3mg/L

For usual waters: high
Possible harm on the growth of water plants, harm on algae
Recommendation:
Binding of chlorine by special products

For pools: too low
No disinfecting effect
Recommendation:
Raise the amount of chlorine by pool products

0,3mg/L - 0,6mg/L For usual waters: very high
Harmful for flora and fauna. Starting fish toxicity (depending on kind).
Recommendation:
Binding of chlorine by special products

For pools: acceptable
Disinfecting effects at a pH-value between 6.5 and 7.6
Higher than 0,6mg/L Dangerously high
Risks:
Possible harm on every water user
Recommendation:
Binding of chlorine by special products.



Meaning of carbonate hardness

Carbonate hardness Meaning
Lower than als 5°dH

Too low
Risks:
Strong instability of the pH-value, toxicity of nitrite and ammonia might rise
Recommendation:
Raise the carbonate hardness up to at least 5° dH and stabilize the chalk-carbon dioxide balance (buffering system)

5°dH - 14°dH

Acceptable
No need to react

Higher than 14°dH High
Risks:
Coagulations (Carbonates) are possible
Recommendation:
Partial water change with water with low CH meaning of total hardness



Meaning of total hardness

Total hardness Meaning
Lower than 8,4 °dH

Soft water
No need to react

8,4°dH - 14 °dH

Medium water
No need to react

Higher than 14°dH Hard water
Risks:
Coagulations (Carbonates, sulfates, phosphates, etc...)
Recommendation:
Technical softening of water change with soft water



Meaning of the iron value

Iron-value Meaning
Lower than 0,2 mg/L

Acceptable
No need to react

High than 0,2 mg/L

High:
Possible colorations, coagulations, changes in taste and smell of the water.
Recommendation:
Decrease through iron binding products



Meaning of the fluoride-value

Fluoride-value Meaning
Over 1,0 mg/L

Acceptable
No need to react
Recommended mineral-water values are max.1 mg fluoride per liter



Meaning of oxygen value

Oxygen value Meaning
8 mg/L

Acceptable
No need to react

4-8 mg/L

Low
Depending on purpose, ventilation of the water or usage of oxygen giving products

Lower than 4 mg/L Extreme low
Cumpulsory ventilation of the water or usage of oxygen giving products

 

What our customers say

Andreas Schuster, Fischzüchter im Nebenerwerb„With AQUA-CHECK, I am able to check my pondwater myself. So I am able to find out early about my water quality and the health of my fish.“

Andreas Schuster, avocational fish breeder

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