So far this week, we'll looked at the size of the tank, the filter and the water.
But what about the correct temperature for angelfish?
I have found my angelfish love water between 78 and 80 degrees. If you have warmer temperatures (82 and above) you will notice the angels breathing through their mouths as well as their gills. This is not good!
Water that is too warm will also cause aggression in angelfish.
I use Aqueon heaters in my aquariums but there are several excellent brands on the market. An aquarium heater is fully immersible so you can install it upright or attach it horizontally to the glass with the included suction cups.
Place the heaters where you want them but don't plug them in for an hour; they need to be acclimated to the current water temperature to avoid cracking.
Always purchase a separate thermometer (usually only a couple of dollars) to make sure your water remains at the correct temperature.
Don't I need a light and hood?