Practical guide6 min
Is a cracked aquarium or failing seam safe?
How to distinguish cosmetic marks from structural glass or seam failure and when an aquarium should be unloaded rather than watched.
aquarium glasscracksilicone seamstructural safety
Knowledge Library
Troubleshooting guides
Direct, practical answers to common aquarium questions.
Troubleshooting
How do I clear green aquarium water?
Control suspended algae by correcting light and nutrient imbalance.
Read guide →TroubleshootingHow do I control hair algae in an aquarium?
Reduce filamentous algae through manual removal and balanced plant care.
Read guide →TroubleshootingHow do I protect an aquarium during a power outage?
Prioritise oxygen, temperature and biological filter survival.
Read guide →What should I do after sudden fish deaths?
Protect survivors, preserve evidence and identify water, toxin or disease causes.
Read guide →Practical guide6 min
What should I do if an aquarium starts leaking?
An emergency sequence for a leaking aquarium that protects people from electricity, lowers structural load and preserves livestock before repair decisions are made.
aquarium leakemergencyelectrical safetytank failure
Practical guide6 min
What should I do if household chemicals enter an aquarium?
An emergency response for detergent, aerosol, cleaner, paint, pesticide or other household chemical entering an aquarium.
chemical contaminationaquarium emergencydetergenttoxins
Why are my aquarium fish chasing each other?
Separate normal display from damaging aggression and inadequate housing.
Read guide →TroubleshootingWhy are my fish gasping at the surface?
Treat surface gasping as a potential oxygen or toxin emergency.
Read guide →TroubleshootingWhy has my aquarium fish stopped eating?
Check water, stress, diet and disease before trying more foods.
Read guide →TroubleshootingWhy is my aquarium water cloudy?
Identify bacterial bloom, suspended debris, green water or precipitation before acting.
Read guide →TroubleshootingWhy is my fish hiding all the time?
Use species behaviour, social needs and stress signals to find the cause.
Read guide →TroubleshootingWhy is there brown algae in my new aquarium?
Manage common diatom films while the aquarium matures.
Read guide →