How-To Guide
Cleaning Aquarium Decorations
Clean aquarium decorations with a dedicated brush and warm water, never soap or household cleaners. Remove them gently, scrub algae and deposits off, rinse well and return them promptly. Disinfection is only needed for second-hand items or after disease, and must be followed by thorough rinsing.
When Aquarium Decorations Need Cleaning
Decorations need cleaning when algae, biofilm, trapped waste, or mineral deposits become excessive, not simply because every surface has lost its brand-new appearance.
Removing Decorations Safely
Move decorations slowly to avoid trapping fish, uprooting plants, collapsing unstable hardscape, or releasing a large pocket of debris into the water.
Safe Cleaning Methods
A dedicated brush, scraper, warm water, and gentle manual cleaning handle many jobs without exposing the aquarium to soap or household cleaning residues.
Removing Stubborn Algae and Deposits
Stubborn growth may require repeated brushing or a material-appropriate treatment outside the tank, while porous or painted decorations need extra caution.
When Disinfection Is Actually Necessary
Disinfection is different from routine cleaning and is generally reserved for disease control, contamination, or equipment being transferred between systems.
Returning Decorations to the Aquarium
Rinse thoroughly, inspect for sharp edges or damaged coatings, replace items securely, and confirm that caves and gaps cannot trap livestock.
Keeping Decorations Cleaner Over Time
Balanced lighting, controlled feeding, routine water changes, adequate circulation, and accessible aquascape design reduce heavy buildup between cleanings.
Frequently Asked Questions
Can I Clean Decorations With Soap?
No. Soap and household cleaners leave residues that can harm fish.
Can I Use Bleach on Aquarium Decorations?
Only for disinfection of non-porous items, well diluted, then rinsed very thoroughly and soaked in dechlorinated water.
How Do I Remove Algae From Ornaments?
Scrub them with a dedicated brush in tank water or warm tap water, then rinse.
How Often Should Decorations Be Cleaned?
Only when algae or debris builds up. Some biofilm is normal and useful.