Due to its composition (humic substances), Aquadrakon Black is not suitable for seawater and relatively unsuitable for the rift lakes (Malawi / Tanganyika).

Aquadrakon Black is the premium compound for tropical soft water and for plant pools.
A number of important substances are added to the fresh water:
iodine, vitamins, mucous membrane protection, humic substances, potassium etc.

These substances are important for improving the water quality of fish, plants and bacterial cultures in the filter and substrate.

Aquadrakon EL has a completely different active principle, as described on the product page. No dissolved substances are added to the water. However, the mineral suspension has various properties which make it suitable for fresh water preparation.
This suspension has a major effect via irreversible adsorption and catalytic decomposition of unwanted substances.

Aquadrakon EL therefore appears to be particularly suitable for fish farms, fish ponds without plants, garden ponds, Malawi and Tanganyika ponds and seawater aquariums.