If an Angelfish feels cramped, they will not feel secure and will not spawn.

The sponge filter also doesn’t trap fry, the fledgling fish, like some other filters. Clean the sponge filter every couple of weeks to keep the tank water in the best condition.

If your water is too hard, use a de-ionization filter. If your water is too alkaline, use a reverse osmosis filter. Either of these filters can be obtained at an aquarium supply store.

Place several spawning slates around the tank to give your Angelfish options.

Instead of overhead lights in the room, use plant lights. [4] X Research source

Use a filter to keep the tank clean. Make sure the water temperature stays between 78 to 85 degrees Fahrenheit (25 to 29 degrees Celsius) with a water heater. Keep the pH level between 6. 5 and 7. Line the bottom of the tank with sand and add large water plants. Also include driftwood for the fish. [5] X Research source

Because it’s near impossible to tell the sex of Angelfish, you can’t know what sexes you’re getting. If you get somewhere between 6 to 12 Angelfish, chances are you’ll have enough of each sex for the Angelfish to find a mate they prefer. When choosing a quality Angelfish, look for a body that’s round and taller than it is wide. Because Angelfish fins are the hallmark of the species, the best fins are straight and free of curves or blemishes. Coloration of the Angelfish is difficult to assess since it’s often based on environment or stress levels. However, be aware of a lack of color or dullness. [7] X Research source

Pairs of Angelfish will often claim a section of the tank as their own and chase off others who come near. [8] X Research source If you think you’ve identified a pair, watch them for 1 or 2 days until you’re certain.

Because the spawning tank will have similar conditions to the 55 gallon tank you can transition the Angelfish quickly. Place the Angelfish in a bag of water from the 55 gallon tank, and put this bag in the spawning tank for an hour. Then you can open the bag and allow the fish to swim out. [9] X Research source

Feed Angelfish bloodworms, frozen brine shrimp, white worms, or a beef heart mixture. [11] X Research source Remove any uneaten food after 3 to 5 minutes to help keep the water clean.

It’s even better to change out out 30% of the water daily.

The female’s papilla is larger than the male’s, which is how you can tell the sexes of Angelfish apart. [12] X Research source

If using a flower pot, you can remove the eggs entirely from the tank and place them in another tank with the same pH and water temperature as the spawning tank. [13] X Research source

Feed them twice a day only what they can eat in three minutes.