Oscars - Astronotus ocellatus :- is a member of the cichlid family. It's name derives from the Latin roots astron meaning star, and notus, meaning back, referring to the ocellated spot on both sides of the dorsal fin of the fish.
I have just come back home from having a look at a pair of Oscars that someone was selling and it broke my heart to see these two fish in a tank that was just too small for them. I did not buy them but I gave the owner a lot of advice.This has prompted me to come home and write this little note up for wanna be oscar keepers.
Most people do not realise that the cute little 1"oscar they bought in the pet store grows very very fast into this beautiful large oscar. I have seen too many oscars in tanks that just do not suit them. These are amazing fish with fantastic personalities and deserve a whole lot better. I have bred and kept oscars for many years and have also seen a lot of posts by people who want to keep these fish but don't know anything about what they require. It's always a good thing to because at least these people are asking the questions. I would hate to think about the ammount of people who do not ask questions and set up a tank for an Oscar or two or three that will just not suit them at all. These are my thoughts on what you should do set up a tank so you can keep these fish.
A fully grown Oscar can reach 12 inches in length and as you can imagine they do need a large tank. So if your tank is a small one find another fish to keep. Minimum tank for one specimen would be 120x45x45 cm about 250l.Extremely good filtration is required as these fish are messy eaters (mine were).Avoid bright lighting, people say this increases aggression but my opinion is these fish don’t like it.
I believe in natural decorations in my tanks, I stay away from little plastic divers, broken bells, ships etc, etc opting instead for natural driftwood and rocks with real plants. Just be warned that Oscars will rearrange your tank if they do not like how you have set it up (remember they have personalities). Also avoid sharp rocks/objects as these fish will fight (lip Lock esp when they are going to breed) and Oscars are always hitting into things and get hurt easily. They heal quickly, especially if water quality is maintained. Keep the water well filtered and clean. I do a water change of at least 25% minimum a week. - by doing so your Oscar will rarely get a disease and you will save yourself a lot of trouble. Good water quality is the key to healthy fish. They are not sensitive to water chemistry as long as extremes are avoided. Ideal temp of 26-27°C. Oscars will eat almost anything but they are gluttons so do not over feed them.
I just realized that this post is a lot longer than I thought it would be so I am gonna end it here. If you have any questions about these fish I will gladly answer them. Just remember this though if you wanna keep Oscars and enjoy them give them a large spacious tank they deserve it.
The above is strictly my opinion – But I had a little help from 2 beautiful 10†Oscars called Jeffie and Scarface.
Aneal