koi hacienda koi sanos

Start the season with healthy koi

Healthy koi – the key factor for every koi lover. 

Because having a koi with stunning pattern but sick … ?


We are already in March and with this – in great part of the Spanish territory – the temperatures are beginning to rise.

With this rise in temperatures, our koi wake up slowly from their “hibernation”.

From 10ºC of water temperature on we can start feeding again. Better to start with very little quantity and gradually increase the frequency (from 1x per day to 3x per day).

Rising temperatures not only wake up our koi, but also bacteria and parasites.

It is not difficult to understand that these organisms develop much faster than our beloved fish. So their “attack” begins before our koi are ready to face it.

If we want to have healthy koi, we have to act NOW.

Koi Hacienda wants to help you have healthy koi from the first moment. That’s why we have developed a super offer:


Koi Hacienda already for long time has been in close contact with Koi veterinarian Maarten Lammens. During one of our visits to the “Holland Koi Show” we talked to him and he introduced us to his product Malamix17. A liquid based on 17 natural ingredients (see full sheet here) that increases the koi’s own defenses.

koi sistema imunitario prevencion

healthy koi with Malamix17

We tried it and were amazed.

When we receive the new koi from Japan or in any other stressful situation, Malamix17 does wonders. And that within very little time (usually results from 2 days).

Maarten continued researching and created a complement product: the Malamix feed (see complete sheet here).

While Malamix17 is poured into the water of the pond and absorbed through the gills of the koi, the feed follows the principle of “healthy yogurt”: Feeling good, starts from the inside “ ?


alimentación koi

healthy koi with Malamix feed

A stitch in time, saves nine. 

Take advantage of our super offer NOW.

Valid until 20th March or end of stock.

Healthy koi NOW




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Carp pox – typical koi winter desease

 Carp pox is an external benign viral disease, which appears mostly in cold times in cyprinus carpio type fish.

Since several clients have sent us pictures of their affected koi, I thought it would be a good idea to write an article about this disease called carp smallpox.

Carp pox is expressed through a gray, white layer on the skin and fins. It looks like candle wax that has spilled over the body of the koi. Carp pox usually arises at low temperatures and usually disappears spontaneously in summer. The fish are not sick and the danger of contagion is low. The vulnerability of the disease is genetic.


enfermedad koi

Carp pox (photo by Dr. Maarten Lammens)

The recommended treatment is to increase the resistance of the fish. This is done by increasing the water temperature to 20 ° C. Other methods to help koi to become stronger is the addition of vitamin C, propolis or immun stimulants in water and food.

Koi Hacienda

Carp pox (photo by Dr. Maarten Lammens)

Our own experience with products to increase self-defense of the koi has led us to the products of specialized koi veterinarian Dr. Maarten Lammens. Thanks to his long experience with koi, he has realized that preventing is still the best remedy. That was the reason why he invested a lot of time in developing a product called Malamix17. A liquid composed of 17 natural ingredients such as ginger, marigold, aloe vera and a long etc. (see product sheet). All those ingredients have the ultimate goal of increasing the koi’s own defenses. The liquid (I call it “herbal liqueur” ?) is thrown into the pond (1 liter of Malamix17 is suitable for 10,000 liters of pond water) and is absorbed by the koi through the gills.

To improve the impact of the liquid, Maarten has subsequently investigated how to introduce these natural ingredients into the koi feed and developed the Malamix feed.

In Spanish it may have a negative connotation due to “MALA-mix”, but it refers only to the first letters of its name MAarten LAmmens.


koi sistema imunitario prevencion

Malamix17 to increase the self defenses

In cases of excessive growth, carp pox can be removed surgically, but it may return after some time.

Carp pox is also called “koi herpes virus I” (NOTHING to do with the deadly koi herpes virus KHV). In Spanish literature can be found under the name “viruela de carpa”.