Main risks

• Water alterations caused by unsuitable materials (limestone in freshwater, treated woods) that may alter pH or hardness.
• Edges, burrs or sharp surfaces that can injure fish or anyone handling the aquarium.
• Entrapment in caves, tunnels or holes that are too narrow for certain species.
• Toppling or falling of heavy pieces that could damage the glass, the substrate or the animals.
• Blockage of the filter, heater or water circulation, creating low-oxygen areas.
• Peeling or shedding of paints or coatings due to use or improper cleaning.
• Suction cups or fixings that come loose, and small parts that may detach or be ingested by fish.
• Build-up of algae and biofilm if periodic cleaning is not performed, affecting water quality.

Safe use

• Choose decorations specifically labelled as aquarium-safe and suitable for the type of water (freshwater or marine) you use.
• Rinse pieces thoroughly before first use to remove dust or residues; do not use soaps or detergents.
• Check edges and points; gently sand accessible burrs and remove loose parts before placing in the aquarium.
• Test stability outside the aquarium; distribute the weight and avoid resting hard points directly on the glass.
• Leave sufficient clearance to the filter inlets and outlets and to the heater so as not to block the flow or fish access.
• Match the size of caves and holes to your species to prevent fish becoming stuck; if in doubt, opt for wider entrances.
• For natural woods, pre-soak so they sink and observe whether they release tannins; remove if they leach excessive colour.
• Introduce decoration changes gradually and under dim lighting to reduce fish stress.
• If the piece requires air, light or other accessories, follow the manufacturer's instructions and check connections out of the water.
• Wash and dry your hands before working inside the aquarium; avoid creams or products that could contaminate the water.

Storage and maintenance

• Clean periodically with a soft brush and water; avoid harsh chemicals and abrasives that could damage the material.
• Remove algae and sediment without scratching the surface; siphon away dirt that has built up around the pieces.
• Inspect for cracks, chipping, rust or abnormal discolouration; replace the piece if it shows deterioration.
• Check suction cups and fixings regularly; replace them if they lose adhesion to prevent falls.
• After introducing new rocks or wood, monitor the water parameters for the first few days; if they change noticeably, remove the piece.
• Store decorations clean and completely dry, in a cool, shaded place, away from heat sources and direct light.
• Protect fragile pieces during storage to prevent breakage and keep everything out of reach of children and pets.

Restrictions of use

• Do not use objects not designed for aquariums (unprotected metals, unsuitable paints, household ornaments) inside the tank.
• Do not boil or bake decorations to disinfect them; some materials may break or release substances.
• Do not place pieces on the heater or block the filter's inlets or outlets.
• Do not overload the aquarium with too many elements; leave swimming areas and access for cleaning and maintenance.
• Do not use with large or digging species if the decoration cannot be secured safely.
• Do not introduce pieces with strong chemical odours or that leach colour persistently.
• Do not allow minors to handle heavy or fragile decorations without adult supervision.