If it wasn't there before, the fish may have a disease and you need to look up the exact type to know how to treat it. If the fish was already patchy colored, it may just be changing its markings, which they do throughout their life.
I believe you mean Betta fish. No, it should be fine. You can treat you Betta fish by giving them bloodworms!
Well, if you love your Betta fish, then it should live by itself. But if you add another Betta to your current Betta fish's tank, then they will start a fight because Betta Fish are Siamese fighting fish and if one Betta is in contact of another Betta, the possible reason would be a fight between them two.
If you want an active fish that moves around a lot then a Betta is not for you.
Betta fish get in fights with fish with colorful fins and bodies. If your betta gets in a fight while your away,the weaker fish may die. But if you see your betta fight with another fish you should try to split the two fish apart [or all the fish that are fighting].
No, snails and betta fish should not be kept together in the same tank as betta fish may attack and harm the snails.
You should feed your betta 3-4 times a week.
Betta fish should be fed flakes once or twice a day, in small amounts that they can consume within a few minutes. Overfeeding can lead to health issues for betta fish.
NO!!!!! They should not eat betta fish...but if your cat has then call a vet, and don't get anymore betta Fish!
No, betta fish should not eat cucumbers as part of their diet. Their diet should primarily consist of high-quality betta fish pellets or flakes specifically formulated for their nutritional needs.
I would definitely not do this. The chemicals from the paint can be extremely toxic to the fish and can possibly be fatal. If you want your betta to stay healthy, do not use paint in their tank!
You should feed your betta fish 2-3 flakes per feeding, 2 times a day. Overfeeding can lead to health issues for your fish.
other Betta fish and the bigger fish.