Why water is so important discus?
As with many aquatic species, discus the water is the living environment of fish. Like our air contains oxygen, CO2, nitrogen and other elements that influence their health status…
Water this "source of life" element is intimately related to our fish.
Also be aware that it is a very good solvent; This means, it has good abilities to dissolve many substances.
These include for example the gas (oxygen, CO2 etc.) mineral salts (Calcium, magnesium, sodium…) or even metals (lead, copper…)
And that we will complicate things somewhat; as these items (dissolved) in water discus can play an important role in physiology and even interact with each other.
Les discus sont originaires d’Amérique du sud…
The waters have seen these fish born in the wild are sweet (they contain few minerals), and acid (pH under 7), Heiko Bleher in his book the Bleher's discus vol. 1» measure e.g. North Victoria do Xingu in 2002 a pH of 6,5. A conductivity 21 microsiemens to a temperature of 28.5 ° C.
The discus is therefore adapted throughout its evolution to live in this type of environment.
Reading this, Numbers of you froncerons eyebrows in scratching his head ... "My discus do not live in such water parameters! And they are living very well!"
I totally agree with you, but I think that this fact remains interesting to hear.
Certainly the years of breeding and selections made our current "Pigeon Blood" and other "Turquoise Red" more tolerant with regard to water quality. It remains that this fish keeps its ancestral party requirements.
Furthermore, we must emphasize the made that man raises the discus since shortly (before the second world war) and that the real explosion of varieties we know not to start in the 1980s...
Also, it is undeniable that each fish species has requirements and tolerances of its own.
In comparison, the discus the tolerance range is smaller example a neon innesi.
The first parameters to know…
KH, GH, water pH…
For the maintenance of breeding discus, a KH located between 2 and 4 with GH 4 to 7 German degrees are quite suitable.
Naturally, with such hardnesses, the pH of the aquarium should be neutral to acid (7 and less than 7).
With regard to nitrogen contents, the discus tolerates a few ad hoc deviations, but not the inconvenience I advise you not to go above 25 mg/L nitrates.
On this subject, I suggest you also check this Article dedicated to the nitrates present in the aquarium water.
For ammonia and nitrite, the zero values are imperative. Their presence is toxic to fish.
I also invite you to consult the article VETO Fish on ammonia toxicity in freshwater.
The discus will be sensitive to the presence of pollutants in the water such as heavy metals, chloramines or other. I do not have specific data about their tolerances on this topic…
But it is important to neutralize these elements before changing water made with tap water; For this use a water conditioner.
The use of a water conditioner is strongly recommended .
I can not count the number of tap water users (unconditioned) with whom I could discuss and who one day came face to sudden deaths problems… after water change.
Rhythm of water changes?
With regard to the rate of change of water, it is generally advisable to renew 30% minimum volume of the aquarium once per week. (We are talking here of maintenance of discus in "community" tank and not growing tank.)
This frequency varies of course according of each case: Reproduction, growing, population of the aquarium etc.
Attention: it will keep in mind that these are the results of your water tests that indicate whether the volume and frequency of water changes are good.
(See also: Rearing and reproduction of the discus on video)
Discus and CO2: Attention danger
Some precautions to take if you broadcast CO2…
As I was pointing in the article on maintenance of the discus, I urge you to check your diffusion of CO2 if you want to use for your plants.
A well calibrated electronic pH meter(!) or permanent CO2 controller like those offered by the company Dennerle are essential to avoid poisoning.
The diffusion of CO2 is often used to lower the pH of the water discus. You should remember that CO2 is beneficial to plants but that the discus appreciate that very little…
From 20 mg/L I noticed that some discus could be strongly unwell.
The water in the discus
IMPORTANT: la qualité de l’environnement de l’animal
As you seen, water is an essential element which determines the life and health of fish.
Ensure a good environment to your discus (ensure a good quality of water) will be the best of the prevention against disease.
Environmental stress is often the first stress that the discus faces. In a healthy environment, the body of the discus is able to fight alone against many pathogenic agents (of diseases).
Be regular in your interview to provide your discus a stable water in accordance to their needs.
Move out of the water needs of discus, This is the risk of exposure to a problem "x" or "y"..
So, you have just finished reading the 1st chapter ! Find the next article on the water parameters and their meanings. Pending, If you want, You can at any time post your comments or questions in the topic "comment" at the bottom page.