Driftwood is floating wood which has wound up on the shore due to the actions of the elements. Many people associate driftwood particularly with the ocean, but driftwood can also be found near lakes and rivers. Since the wood can float for an extended period of time, it is often bleached by the sun. Driftwood is a common source of fuel in regions where it washes ashore, and it is also used in art pieces and to make structures ranging from sculptures to fences, depending on the sort of driftwood involved.
Driftwood sculpture is not uncommon in areas with large amounts of driftwood. Some artists use the formerly floating wood as is, while others may carve or cut it, using it to make bases for sculptures, picture frames, and other crafts. The wood can also be used to make furniture, canes, and fences. On the beach, driftwood provides shelter to a range of shore-loving organisms, ranging from insects to shellfish.
In my experience fish from South America, Central America, but also from North America, and from Asia like having driftwood in the tank. Bear in mind that some cichlids from North and Central America dont prefer low ph levels.
Is driftwood lethal to fish?
No. Unless it contains poisonous metals or too much salt. However, bear in mind that shapes may be lethal! When fish chase each other, they hit objects in the aquarium from time to time. If shapes are too pointed, then fish can lose eyes or can even die (some of my fish already lost eyes during chases).