Assuming you already have a pair of Discus ready to lay eggs, let's take a look at the basics of preparing a tank for them. A bare bottom tank 303 x 243 x 203 (length x width x height), is ideal for breeding Discus. Water level should be at least 18 inches from the bottom of the tank.
Recommended water temperature is around 85 degrees Fahrenheit. Discus are famous as peaceful and shy aquarium inhabitants and they are very sensitive to stress and disturbance. Covering some parts of the tank with black paper from outside will get you better results if you are using a glass tank. If you are planing on installing a Bio filter, try to fix it from the outside.
Maintaining water quality is very important. In their natural habitat, discus live in essentially distilled water. Therefore, a PH value of 6.5 or 7 should be maintained. Lots of ammonia will be produced due to the high protein diet you should be providing, and the PH levels should be watched very carefully. Replacing 10% of the water in the tank everyday will help you solve this problem.
Few broad leafed plants or slate can be provided as a spawning site. I personally use an inverted flowerpot or a potted plant. Do the above correctly, and your tank should be more than suitable for a pair of mature Discus to lay eggs. Make sure you maintain the water quality and keep the water clean, and you shouldn't be having any problems with the tank.
A breeding pair in a well maintained tank will lay eggs as often as every week, as many as fifteen times. They will usually go through two of these spawning cycles in a year.
You can visit my blog on breeding Discus for more information.
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