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This week

Q&A

tang (Ctenochaetus tomiensis) and filefish (Acreicthys tomentosus) - it’s the standard esha dosing recommendation?

1d agoAsk

Earlier this month

Q&A

Ja

4d agoAsk
Q&A

Wo kann ich noch Matrine beziehen?

4d agoAsk

August 2026

Q&A

Sterbai Corydora. Just noticed this today. He is paler than normal and less active

1mo agoAsk
Q&A

please could you tell me where i can buy your fishfood in 79098 Freiburg im Breisgau

1mo agoAsk

June 2026

patreon.com

Aquarium Recovery Tank Guide for Safer Treatment

Patreon

3mo agoAsk
Q&A

Please tell me the dosage for metronidazole using for discus

3mo agoAsk
patreon.com

Fish disease case nr. 345 Pelvicachromis Cichlid with bacterial infection & tubercles in the organs

Patreon

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Fish Mucus Coat Repair That Actually Works

Patreon

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Q&A

What does research actually show about UV sterilization in aquariums?

3mo agoAsk
youtube.com

Sick Dwarf Cichlid Apistogramma. See link complete video. #fishdisease #apistogramma #Cichlid

3mo agoWatch
youtube.com

Books on fish diseases. See www.geraldbassleer.com

3mo agoWatch
youtube.com

Fish disease case nr. 365 Tankraised Apistogramma borelli with bacterial infection and few tubercles

3mo agoWatch
Q&A

Even een vraagje voor de visdokter.. de vijver is nu al jaren stabiel, ook al jaren geen nieuwe vissen en amper dode vissen. Sinds dit voorjaar al 4x onverklaarbaar een dode volwassen goudvis. En nu opeens een grote karper die het moeilijk heeft. Nergens beschadigingen te zien, vinnen intact, kieuwen niet beschadigd, niet schuren, flitsen, geen lucht happen. Ik kan het helemaal niet verklaren. Alleen een wat opgzwollen buik en precies wel gasvorming? Geen idee wat hier aan de hand is, ik ga nu toch veel water wisselen, proberen temperatuur omlaag te krijgen. Vrees dat t iets met de hitte is.. Ik weet dat er KHV in de vijver zit, maar daar zijn vroeger alleen koi’s aan doodgegaan, nooit goudvissen en ook de gewone boerenkarpers niet, die zijn juist t sterkste 🧐

3mo agoAsk
Q&A

I have been experiencing Cryptocaryon infestations in my marine fish holding system (which you personally confirmed when I sent you a video taken through my microscope). The symptoms when I discover this parasite are not the usual ones described in books, as the fish do not show white spots on their bodies, and their coloration often remains intact without any mucus production. Affected fish lose weight within one or two days, breathe heavily, and die in no time, without even giving me enough time to intervene with a copper-based solution. The holding system is cleaned weekly by siphoning out detritus. In addition to biological filtration, it is equipped with a powerful protein skimmer and a 75W UV lamp, for a total system volume of about 1000 liters. I am writing to ask if you could recommend a preventive strategy to avoid the animals' suffering and also to limit financial losses.

3mo agoAsk
Q&A

What is cyromazine and how is it used in aquaria?

3mo agoAsk
youtube.com

Corydoras catfish worm infection. See link complete video. #fishdisease #corydoras #catfish catf

3mo agoWatch
Q&A

Ok I will send photo

4mo agoAsk
youtube.com

Fish disese case nr. 364 Wild Corydoras concolor with Camallanus and other worm infections

4mo agoWatch
youtube.com

sick cardinal tetra. See link complete video. #fishdisease #aquarium

4mo agoWatch
Q&A

Please help! My fish is sick and I need help !

4mo agoAsk

May 2026

PDF

CompatibilityENG Fish.pdf

4mo agoRead
Q&A

What can you diagnose on the angelfish?

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How much does a fish disease consultation cost?

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How do I use the free diagnostics tool

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Is it not available in the US?

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How long does it take to get a reply from the fish doctor?

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This Angelfish with pop-eye - can you compare with your data & photo?

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Q&A

Is there a free tool to help diagnose my fish disease?

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Q&A

Is there a consulting option for businesses or people with multiple fish problems?

4mo agoAsk