Visidrakon - Water Clarifier

Crystal-clear water by removing clouding and floating algae.
Activates new filter material and binds phosphate.


Anyone who has ever set up an aquarium or garden pond is familiar with the more or less powerful, whitish turbidity that often makes new aquariums and ponds a less than pleasant sight in the first few days. The release of impurities from gravel and decorative material as well as the new technical equipment are the main reasons for this. Experienced aquarists or pond owners have therefore often prepared an old, well-established filter. This filter is able to remove this turbidity in a short time.

But what should everyone else do?

In these cases the water clarifier Visidrakon can help very wonderfully. A few drops of the solution are introduced into the strongest streaming into the tank and distributed quickly, causing the turbidity to flocculate quickly.
Flocculation means that the microscopically small clay particles, protein colloids, floating algae and bacteria first combine to form small, then increasingly larger flakes. Due to their higher density, these flakes sink faster and can be easily suctioned off or collected by the filter.
Another advantage is that phosphate and other harmful substances are bound in the flakes during this flocculation process.

How does Visidrakon do this?

Often such turbidity substances as well as bacteria and microscopic algae have identically named electrical charges on their surface which, due to their electrostatic repulsion, ensure that the particles cannot stick together and float in the water. The introduction of highly charged ions such as Fe3+ prevents this repulsion and ensures rapid clumping.

In the case of suspended algae and bacterial blooms (mass reproduction), the application may have to be repeated several times because algae and bacteria from small residues can regenerate within a day after the flocculation process has been completed.
In the case of multiple use, a larger water change is absolutely necessary at least after the 3rd use in order to prevent an excessive drop in pH and KH.


8 drops / 20 l water resp. 2 ml / 100 l water
Do not overdose!
Neutralizes approx. 0.2 °d carbonate hardness pro application

Do not use at the same time as water conditioners and aquatic plant fertilizers. These preparations should only be added several hours after the use of Visidrakon.
If not, the desired effect will not be achieved and the iron content of the water in the aquarium will be increased by too great an amount.
Optionally you should make a larger water change prior to application if you had already applied recently water conditioner or fertilizer.


Contains 50 ml Iron(III)chloride solution sufficient for approx. 2,500 l in single application.

Possible Dangers

  • Keep out of reach of children!
  • Attention: reacts very acidly
  • May lead to hardly removable colourings on clothes and carpeting!


Signal word: Danger

Danger warnings

H290 May be corrosive to metals
H302 Harmful if swallowed
H315 Causes skin irritation
H318 Causes serious eye damage

Safety information

H290 May be corrosive to metals
H302 Harmful if swallowed
H315 Causes skin irritation
H318 Causes serious eye damage
P234 Keep only in original packaging
P280 Wear protective gloves/protective clothing/eye protection/face protection
P301 + P312 Is swollowed: Call a poison center/doctor if you feel unwell
P303 + P361 + P353 If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower]
P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing
P307 + P311 IF exposed: Call a poison center or doctor/physician
P406 Store in a corrosion-resistant container with a resistant inner liner
P501 Dispose of contents/container to hazardous waste disposal

10 of 10 reviews

4.05 out of 5 stars






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27 May 2024 00:00

Funktioniert! Hat geholfen

Funktioniert! Hat geholfen, eine massive Algenblüte in den Griff zu bekommen. Zwei Anwendungen mit der empfohlenen Dosierung waren nötig, dazwischen 50% Wasserwechsel und ein Tag Pause.

5 April 2013 06:55

Ich setzte Visidrakon für ein ...

Ich setzte Visidrakon für ein 84l und ein 260l Aquarium ein. Nach ca. 3 - 4 Stunden war das Wasser wieder glasklar und die Fische und Garnelen haben es problemlos vertragen.

15 May 2013 09:40

Das Produkt wird bei uns im Te...

Das Produkt wird bei uns im Teich eingesetzt. Zeitnah kann ich daher noch keine Angaben über die Effektivität machen.

29 October 2013 21:16

Einfache Anwendung und super E...

Einfache Anwendung und super Ergebnis!

13 February 2014 09:12

Glasklares Wasser nach Reaktio...

Glasklares Wasser nach Reaktion. Schwebstoffe und Phosphat fällt aus und wird so im Filter zurück gehalten.

23 June 2018 06:28

Produkt empfehlenswert

Hatte eine Bakterienblüte über zwei Monate in meinem 980l Becken und bekam diese nicht weg. Mehrere Wasserwechsel ca.50%, tagelang nicht füttern, Temperatur runter, Boden mehrmals abgesaugt, UV-C Klärer tagelang keine Verbesserung. Letzte Idee wäre ein Twinstar gewesen. Doch dann hab ich von Visidrakon gelesen und es angewendet. Das erste Mal leider nur leichten Erfolg. Dann ein zwei Wochen später 75-80% Wasserwechsel und dann nochmal Visidrakon. Dann sah das Wasser es richtig gelb weiß aus. Aber über Nacht wunderschönes klares Aquariumwasser. Jetzt noch mehrmals oberstes Filtermaterial reinigen und dann ist es wieder TOP! Kaufempfehlung Danke an DRAK

14 May 2013 08:46



13 July 2014 19:22



9 January 2021 22:33

Mäßiger Erfolg

Ich habe mehrmals versucht, eine leichte Trübung im Becken damit zu beseitigen aber der Erfolg blieb leider aus. Liegt aber daran, dass ich mit Dosierpumpe stetig Dünger zuführe. Lasse ich den Dünger weg, funktioniert Visidrakon aber der Pflanzenwuchs stagniert sofort. Die Anwendung bei gleichzeitiger Düngung ist sinnlos (steht aber auch drauf).

16 January 2013 17:02

Das Produkt ist in der Anwendu...

Das Produkt ist in der Anwendung unberechenbar. Die Anwendungsanleitung halte ich für ungenügend.

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