How often should I clean the filter media?
How to change the filter felt of a sera air membrane pump
Goldfish got stuck, caudal fin is torn
What to do in case of brush algae?
Replacing an aquarium with a bigger one
Blue-green algae / Cyanobacteria
Black algae in a goldfish aquarium
Sudden decrease of water quality and snail invasion
Black fin edges after a fin rot treatment
Nitrite level remains very high for months
Keeping Spinycheek Crayfish (Orconectes limosus)
Setting up an aquarium anew while it is in operation
pH value remains below 6.5 even after a water change
How to carry out a treatment against gill flukes
How large does an aquaterrarium for terrapins have to be, and what do I have to consider when setting it up?
Open wound on the head of a terrapin
Do Otocinclus (Midget Sucker Catfish) damage plants?
Cleaning pH electrodes
How many Kribensis (Pelvicachromis pulcher) in 180 liters?
seramic calibration: Can you use pH 4 instead of pH 9?
How is a fluorescent tube constructed and what do you have to observe during operation?
Rot zones in the bottom gravel
Which crabs are suitable for aquariums?
"Moss balls" / Food amount
How can I catch fish that cannot be caught with a net?
Questions about breeding Colisa lalia (Dwarf Gourami)
Female Pearl Gourami is strongly bloated on one side
Worms and Hydra