An Oscar may turn from black to grey if it is frightened scared or distressed in any way. Fish like Oscars tend to show much darker colors when their surroundings especially the substrate is also of a darker color and vice versa. Palmer Aquatics Clips 383 585 views.

Moreover oscars will also often change from black to grey according to their tank environment.

Oscar fish Tiger oscar fish care - food facts behavior - duration 9 12. Treating fish with parasitic worms fish stopped eating and has stringy white pooh. It attacks fish with low immunity often the result of stress. Fungus can also cause skin disease. Parasites and stress are linked to hole in the head disease as well. Oscar skin diseases often produce small white dots on the fish s body. An infected oscar also might have cottony gray areas on its body. Hey my tiger oscar is turning light grey alot when he should be dark black is he dying.

The substrate and background in the tank are white or another light color fish will show much darker colors when their surroundings are dark-colored . The article below offers information compulsory for raising and breeding oscar fish properly their behavioural issues tank mates faq and forum answers on questions asked by our visitors and we also have another page devoted to oscars be sure to visit it too as it contains personal experiences of fish keepers oscar fish profile. A good example would be when a fish keeper buys a new fish from the fish store where nitrate levels are kept low. They then take the fish home and put it in their own aquarium where nitrate levels are very high. Nitrate shock can kill fish in a matter of 24 hours. Nitrate shock can also occur in a mature aquarium. Just natural colors nothings wrong for some strange reason some fish just turn a different color. I ve had an african cichlid turn from yellow to black another one from white to orange and a goldfish turn white.

I don t know what causes it but i m certain since their still alive that it s not a disease. If you add too many fish at once then you may notice spikes in ammonia levels. This is often completely harmless to fish as the ammonia spike will only last a day or so until the bacteria catch up and water conditions stabilise. Excessive amounts of algae will make your water turn green and cloudy.

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