1. You should take out any carbon filters in the aquarium when you are medicating your fish.† The carbon in the filter will remove the medicine from the water, so it is best to remove it all together.
2. If you use your tap water, you should make sure to remove the chlorine from the water before you add it to the aquarium.† Chlorine can be very harmful to some of the fish in your aquarium.† You can purchase kits to remove the chlorine from your aquarium at many retailers online.
3. When breeding angelfish, it is normal for the first spawn to suffer heavy losses and not make it all the way to the hatching phase.† You should have the proper equipment before you start to breed angelfish.