Dwarf Gouramis are courting
Piranhas in an aquarium
Veiltail goldfish in an aquarium
Can I keep aquarium fish in a pond during summer?
Rot zones in the bottom gravel
Brown layers on plant leaves / Diatoms
What to do in case of brush algae?
Newly added plants turn yellow / Leaves decompose
Loricariids eat plants
Is a CO2 system by all means necessary?
How can I protect sensitive plants during a treatment?
Can an aquarium be planted too densely?
Blue-green algae / Cyanobacteria
Which fluorescent tube in the front position?
Snails eat plants
Plants do not grow but dissolve
Do Otocinclus (Midget Sucker Catfish) damage plants?
Does "ironwood" contain iron that can be taken up by plants?
Does the sera blue sky support algae growth, and is it suitable for planted aquariums?
Kribensis (Pelvicachromis pulcher): Questions about behavior and species they can be kept together with
Black algae in a goldfish aquarium
Does sera aquatan affect iron fertilization?
Eggs or sporangia on Java fern?
Water cloudiness and bottom ground mix-up
Cleaning pH electrodes
Hornwort floating at the surface?
First fish stock for a 60 centimeter aquarium
What to do in case of floating algae in the aquarium?
Biological activation delayed by filter "cleaning"
Fish as snail removers?
Shell dwelling cichlids have become more aggressive
Questions about stocking a new 200 liter aquarium
Air bubbles at the surface and cloudiness after setup
Which temperature for Discus?
Snails multiply too quickly
Sudden decrease of water quality and snail invasion
Can I combine sera baktopur and sera costapur?
Keeping Spinycheek Crayfish (Orconectes limosus)
How are fertilizer tablets optimally applied?
sera baktopur: Application tips