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Details

All About the Product

Product description

GTC – Koi Parasiticide for parasites & fungal infections

 

GTC is a liquid treatment for koi and other suitable ornamental fish against single-celled parasites and fungal infections. It is used for conditions including Costia, Chilodonella, Trichodina, and white spot disease. The active ingredient combination consists of acriflavine and malachite green. Treatment is carried out on days 1, 3, and 5 directly via the pond water. During treatment, UV-C and ozone must be switched off and sufficient aeration must be ensured.


Suitable for

🐟 For koi and suitable ornamental fish
🦠 For single-celled parasites
🔬 For Costia and Chilodonella
⚪ For white spot disease
🧫 For Trichodina
🍄 For fungal infections
💧 For application via the pond water


Benefits at a glance
  • Against single-celled parasites and fungal infections
  • Suitable for Costia and Chilodonella
  • Also applicable for Trichodina
  • Usable for white spot disease
  • Combination of acriflavine and malachite green
  • Simple dosing via the pond water
  • Clearly defined treatment schedule

Available variants

⭐ 0.5 L
⭐ 1 L

Application and Dosage
Application
Distribute GTC evenly over the pond water. Switch off UV-C and ozone during the treatment. The treatment should ideally not pass through the biological filter; if the filter is switched off or internally circulating, the pond and filter must be sufficiently aerated. Do not feed during the treatment. Wear gloves and do not use in water with a hardness below 5 °dH.
Dosage
On day 1, day 3, and day 5, dose 17 ml of GTC per 1,000 liters of pond water each time.

On day 2 and day 4, change 10% of the pond water each time. On day 6, perform a 25% water change. According to the manufacturer, 1 liter of GTC is sufficient for a complete treatment of approximately 20,000 liters of pond water.

What buyers say

Reviews

4,0 for this itemfrom 1 reviews
Hand feeding koi by the pond edge

Before you order

Frequently Asked Questions

When will it arrive?

Ships from Germany, usually within 2 to 4 business days. Individual items are reproduced upon order – in that case, it takes about 10 to 14 business days. The estimated delivery date is shown at the top of the checkout area.

How much is shipping?

Within Germany €5.90 up to 30.9 kg, tiered above that. To Austria, Belgium, Luxembourg and the Netherlands from €7.50, to Denmark from €13.90 – each tiered by weight.

Can I pick it up from you?

Yes, free in Mönchengladbach, Tomphecke 25. Monday, Wednesday, and Friday from 10 am to 5 pm. Just add it to your cart and select pickup at checkout.

I'm not sure if this is suitable for my pond.

Then call us before you order: +49 152 27783926, Monday to Friday from 9 am to 3 pm. You’ll speak with someone who keeps koi and builds pond systems themselves. If a product isn’t right for your setup, we’ll tell you.

Can I return it if it doesn't fit after all?

The statutory 14-day right of withdrawal applies to equipment, accessories, and unopened goods. For hygiene reasons, we cannot accept returns of opened food and grooming products.

How do I pay?

PayPal, Klarna, Apple Pay, Shop Pay, credit card and the other payment methods you see at checkout. You can also pay in person when picking up your order.

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