Brown layers on plant leaves / Diatoms
Piranhas in an aquarium
Does sera aquatan affect iron fertilization?
Eggs or sporangia on Java fern?
Can I keep aquarium fish in a pond during summer?
Loricariids eat plants
Veiltail goldfish in an aquarium
Newly added plants turn yellow / Leaves decompose
Fish as snail removers?
Which fluorescent tube in the front position?
Cleaning pH electrodes
Sudden decrease of water quality and snail invasion
Snails eat plants
How are fertilizer tablets optimally applied?
Questions about breeding Colisa lalia (Dwarf Gourami)
Angelfish eggs do not develop
Plants do not grow but dissolve
Dwarf Gouramis are courting
Rot zones in the bottom gravel
What to do in case of brush algae?
Do Otocinclus (Midget Sucker Catfish) damage plants?
Does hornwort not grow roots?
Should I leave angelfish eggs with the parents, or should I raise the fry separately?
What to do in case of floating algae in the aquarium?
Lighting time in an aquarium?
How do I carry out a proper quarantine?
Can an aquarium be planted too densely?
Fish stock for a 60 cm (23.6 in.) aquarium
Air bubbles at the surface and cloudiness after setup
Is a CO2 system by all means necessary?
Which fluorescent tubes?
Is it possible that no elevated nitrite levels can be detected a few days after a nitrite intoxication?
"Moss balls" / Food amount
Worms and Hydra
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)
What to do in case of dropsy?