Water · 8 min
Cycle a new aquarium without guesswork
A practical route from an empty tank to stable, fish-safe water.
PetFish field notes · 12
Care, made clearer.
Practical notes for stable water, healthy animals and better everyday aquarium decisions.
↗
Fish · 7 min
Choosing your first community fish
Temperament, adult size and group numbers explained simply.
Care · 6 min
A calmer live-fish acclimation
Reduce stress during the most important hour after arrival.
Plants · 9 min
Light for a healthy planted tank
Balance intensity and duration before adding more fertilizer.
Water · 10 min
Read a freshwater test kit
What ammonia, nitrite, nitrate and pH mean for your animals.
↗Invertebrates · 8 min
Build a shrimp-safe aquarium
Mature surfaces, stable minerals and gentle filtration.
↗Equipment · 6 min
Clean a filter without restarting the cycle
Protect beneficial bacteria while restoring steady flow.
Fish · 9 min
A useful fish compatibility checklist
Compare water, behaviour, size and feeding—not colour alone.
Seasonal · 8 min
Aquarium care in Sri Lankan heat
Oxygen, temperature and feeding adjustments for warmer weeks.
Care · 5 min
The dependable weekly water change
A repeatable routine that avoids sudden parameter swings.