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
Angelfish have damaged fins after transfer
Water cloudiness and bottom ground mix-up
Add hatchetfish to existing fish stock?
Replacing an aquarium with a bigger one
How can I protect sensitive plants during a treatment?
Blue-green algae / Cyanobacteria
Kribensis (Pelvicachromis pulcher): Questions about behavior and species they can be kept together with
Black algae in a goldfish aquarium
Biological activation delayed by filter "cleaning"
First fish stock for a 60 centimeter (23.6 in.) aquarium
Hornwort floating at the surface?
Does the sera blue sky support algae growth, and is it suitable for planted aquariums?
Which temperature for Discus?
Keeping Spinycheek Crayfish (Orconectes limosus)
Can I combine sera baktopur and sera costapur?
Snails multiply too quickly
sera baktopur: Application tips
Shell dwelling cichlids have become more aggressive
White worms in the aquarium
How much sera floredepot is required for a 150 liter (33 US gal.) aquarium, and how long do the nutrients last?
Fish become ill / Root smells bad
sera CO2-Start suitable for 112 liters (24.6 US gal.)?
Setting up a low-current tank for gouramis
Disinfect quarantine tanks after use?
Socialization of Discus
Water change rate and filter cleaning
What is the best way to attach moss to a root?
Gluing rocks and decoration with silicone
pH value remains below 6.5 even after a water change
Can I keep Dwarf Livebearers (Heterandria formosa) together with Platies and Corydoras?
CO2 dosage
Female Butterfly Cichlid attacks newly added male