Due to their sometimes intense coloring, stony corals are considered the jewels of reef aquariums. However, their coloring is influenced by numerous factors and so it is sometimes not easy to maintain the colors of the animals over a longer period of time or even to improve them. We explain which molecules and processes are responsible for the coloring of your corals.

For good coral growth and hard coral populations, it is important to have sufficient calcium and carbonates in the seawater. We present you with 3 methods of supply!

The nitrogen cycle - what is it actually? We'll explain everything you need to know about it as a saltwater aquarist.

Nitrate levels that are too high can encourage algae growth and limit the coloration and growth of corals. To prevent this from happening, we have 7 tips for you on how to reduce the nitrate level.

As a saltwater aquarist, you will not be able to avoid water analysis. But don't worry - you don't have to be an ace in chemistry to determine important values ​​such as KH, phosphate and nitrate. With commercially available drop tests, you can determine most parameters quickly and easily.

Many aquarists report the positive effects of an additional dose of iodine on the inhabitants of their aquariums. These descriptions mainly relate to the care of soft corals, gorgonians and encrusting anemones. But also to the increase in blue and violet coloration in hard corals.

Did you know? The adsorbing surface of a teaspoon of activated carbon is about the size of a football field. Enough to absorb plenty of yellow substances and make your aquarium crystal clear.

A weekly 10% water change is usually sufficient to supply trace elements if the coral population is small and easy to care for.

Among countless pieces of information and reports, there are still some reef tank myths that persist to this day and make us shake our heads. We have put together a small selection for you here and will clarify them.