This is what you need to do. If the eggs have been laid on something that can be removed, like a piece of rock then take it out and place it in a small container that is big enough to cover the eggs to a depth of around 6 inches. You can be absolutely sure that the Oscars will not be happy about you taking their eggs so expect them to attack your hand. You should fill this with water from the main tank making sure that it is in very good condition. You need to have around 5 inches of space all around the rock. If the eggs are on a thin rock then you need to prop the rock up so it is at an angle. You want the higher end to be around two or 3 inches. You then need to place an air stone under the higher end and try and set it so the bubbles are released around the eggs. You don't want to have the bubbles shooting so fast that they disturb the eggs though.
You should then add some methylene blue to the water until it turns dark blue. This is used to help prevent and treat fungus on eggs. Keep the temperature at a constant level until the eggs hatch. After a while, the fry will fall of the rock, when they have all fallen off, remove the slate. Once the yoke sack has disappeared, you can start feeding them. You can now transfer the fry into their own tank now. This is now the crucial part of breeding Oscars. The tank doesn't have to be very big, 10 or 15 gallons will suffice. If you put them in a tank that is too large, they will not be able to find their food easily enough.
Good luck and keep us informed maybe a couple of pictures would be great too.....
