White worms in the aquarium
Which filter for a 30 liter shrimp tank?
Problematic fish stock / Can fry stay with their parents?
Which fish can be kept together with Fighting Fish?
sera CO2 reactor: Connection and installation
Biofilm on the surface
Angelfish behave apathetically
Conditioning saltwater for shrimps
Brown layers on plant leaves / Diatoms
How can I hibernate goldfish living in a pond indoors?
Sand and gravel in combination? / How much sand is required?
Is gravel with 3 - 6 mm grain size suitable?
Can I keep male Guppies without females?
Water change rate and filter cleaning
How often should I clean the filter media?
Newly added plants turn yellow / Leaves decompose
Which pump is suitable for the sera gravel cleaner?
Guppy-like fish with orange and black pattern - which species is this, and how can I keep them? (Endler's livebearer)
How can I catch fish that cannot be caught with a net?
Water change after/during a sera costapur treatment
How large do Ancistrus catfish grow?
Tiger barbs nibble at fins of Guppies
No water changes while being away for three weeks? / Preparing food for vacation substitute
Are fertilizers harmful for shrimps?
Male Platy is aggressive against members of its own kind
Water smells bad
Amyloodinium (Oodinium) upon adding new fish
Air bubbles at the surface and cloudiness after setup
Pressure filters in saltwater?
Worms and Hydra
Angelfish have damaged fins after transfer
UV protection foil for algae prevention?
Blue-green algae / Cyanobacteria
Can I also use tap water for preparing saltwater?
Which fish for reducing the number of Guppy fry?
What can I do against cloudiness?
Which fluorescent tube in the front position?
How noisy is the sera fil external filter?
sera CO2-Start suitable for 112 liters?