The Learning Center

The Learning Center is a collection of articles, forming a knowledge base for learning about discus fish. It is a free resource completely dedicated to discus. Start by browsing the articles below. Each article has a comment section on the bottom so that you may engage our experts-- and each other. We know you are eager to access the website's content. So, let's get started on your journey into the wonderful world of the incredible discus fish, and learn why the discus truly lives up to its name, the "King of the Aquarium."

Fish Fungus
Fungus consists of fine white threads known as hyphae that pass through organic material. These hyphae form distinctive patches on fish that resemble cotton wool.   Pathology   The fungi involved include species of Achyla and Saprolegia, often referred to collectively as water molds.... Read More
The Importance of the Quarantine Process for Discus
Discus fish care should be taken seriously. For this reason therefore, there are different scenarios that will require a quarantine period.   Discus Quarantine Process – Scenario #1- Purchase of New Discus Fish
Different Kinds of Discus Acclimation Methods
Acclimation is critical for discus fish. The water that your new discus fish are packaged in has different temperature and pH parameters than your fish tank. Due to the fact that discus fish are very sensitive to even minor changes in temperature and pH, proper acclimation is the key to ensuring... Read More
More on Discus Pop-Eye
Symptoms: Eyeball looks cloudy and swollen and is protruding.  If not treated quickly it can cause blindness and death.   pop-eye   Cause: Bacterial infection usually caused by poor water quality.   Is it contagious to other fish:  No  
More on Discus Cloudy Eye
Symptom: White film on discus eyes.   Cause: Poor Water Quality   Is it Contagious to other fish: No   Treatment: Perform large water changes for 3-4 consecutive days until white film is gone.   Summary
Treatment and Causes of Discus Ich
Discus Ich is a parasitic infection of fresh water fish caused by ciliate. It can be ichthyology which is a branch of zoology devoted to the study of fish. “Ich” is the small, white and clear spots on the bodies of discus and several on the fins. The spots are a bit smaller than the typical salt... Read More
Caring for Wild Discus
Wild discus fish are a bit harder and demanding to keep compared to the domestic discus fish. However, the basic requirements for both are all the same. These requirements are like warm, clean, fresh water as well as a varied diet. Wild discus care therefore would be easier for one who has... Read More
Stunted Discus
Discus fish can be a challenge to keep. Keeping them in favorable conditions will make them achieve their desired maturity size depending on the type of discus fish. These favorable conditions are water temperature, hygiene, proper feeding, fish tank water pH and other elements levels and so on.... Read More
White Feces: Long Stringy Poop in Discus
White feces in fish, also called white stringy poop, is a fairly common symptom in both freshwater and marine aquarium fish which not always accompanies a certain disease. However, most of the time, the lumpy and/or white stringy feces (or sometimes even yellow poop) in discus fish is a sign of... Read More
Discus Plague, or Black Disease is a Viral Infection
Discus Plague
Leaning to One Side or Another: Discus Fish Tilting or Laying Flat
Leaning to one side or another in discus fish, also known as tilting sideways and laying flat is a common and very general symptom in a sick or stressed discus fish. This behavior usually happens at the dark corners of the aquarium, near the surface or bottom of the tank.
Hole in the Head Disease: Head & Lateral Line Erosion in Discus
Hole in the head disease or HITH in discus fish also known as head and lateral line erosion, or HLLE is a very common aquarium and tropical fish disease that can affect most cichlids such as symphysodon discus, oscars, and etc. While the discus hole in the head disease can be fatal, this is not... Read More
Cloudy Eye: A White Film & Milky Sheen Covering Discus Eyes
Cloudy Eye is a very common problem/condition not only among discus, but in most other tropical aquarium fish (some rare fish species have a normal cloudy sheen to their eyes). In most cases the cloudy eye(s) is not a disease in itself, but rather a symptom which may or may not accompany discus ... Read More
Pop-Eye: The Swelling and Bulging of Discus Eyes
Popeye in fish also called exophthalmus, proptosis, exorbitism, exophthalmia, or exophthalmos is not a specific discus disease itself but describes a condition and can be a symptom&nbs
Metronidazole Dosage & How to Use Flagyl for Discus
Metronidazole (MNZ) is a very popular and effective antiprotozoal medication in aquarium and ornamental fish industry which is used to treat a vast variety and range of both internal and external protozoan infections and parasites (not worms) in discus and other tropical fish. Other than a strong... Read More
Worm Infestations in Fish
As anyone who has tried to maintain a fresh or saltwater aquarium is certainly aware, fish in captivity are subject to a myriad of health problems. In addition to the often discussed external pathogens, such as protozoa, bacteria, trematodes, etc, fish may also host internal infestation of... Read More