Sand and gravel in combination? / How much sand is required?
Newly added Cardinal Tetras are pale
Water becomes cloudy after a water change
Black fin edges after a fin rot treatment
How can I lower the iron level?
Are clam and snail shells harmful in an aquarium?
Juvenile Guppy has a distorted spine
New gourami attacks older ones
How often should I clean the filter media?
Hornwort floating at the surface?
Eggs or sporangia on Java fern?
Water smells bad
Can I also use tap water for preparing saltwater?
How large does an aquaterrarium for terrapins have to be, and what do I have to consider when setting it up?
Can I keep terrapins and fish together?
Water change rate and filter cleaning
Worms and Hydra
Shell dwelling cichlids have become more aggressive
Dwarf Gouramis are courting