Betta raja

Fin rot and columnaris4 min read

Bacteria that attack the fins, mouth and skin, nearly always after poor water. When water changes are enough, and when more is needed.

Velvet and dropsy4 min read

Velvet is a fast-moving parasite. Dropsy is a sign that something is seriously wrong inside the fish. How to recognize them, and what you can do.

How to set up an Asian aquarium5 min read

Two aquariums from Southeast Asia: calm forest streams and peat swamps with soft, brown water, and fast mountain streams with cool, oxygen-rich water.

How to add new fish4 min read

From the store to the tank: how to get the fish used to your water, why you should add only a few at a time, and what to watch for in the first few days.