Piranhas in an aquarium
Can I keep aquarium fish in a pond during summer?
Veiltail goldfish in an aquarium
Fish as snail removers?
Cleaning pH electrodes
Should I leave angelfish eggs with the parents, or should I raise the fry separately?
Dwarf Gouramis are courting
Fish have scratches
Wound on a Black Molly
Which size for a beginner's tank?
Guppy-like fish with orange and black pattern - which species is this, and how can I keep them? (Endler's livebearer)
Eggs or sporangia on Java fern?
Lighting time in an aquarium?
What to do in case of dropsy?
How is a fluorescent tube constructed and what do you have to observe during operation?
Trigonostigma (formerly: Rasbora) espei are courting
Bottom gravel is clogged by sludge
What to do in case of brush algae?
Angelfish have damaged fins after transfer
Questions about breeding Colisa lalia (Dwarf Gourami)
Brown layers on plant leaves / Diatoms
What to do in case of floating algae in the aquarium?
How do I carry out a proper quarantine?
Rot zones in the bottom gravel