Pond Equipment
OASE AquaOxy 2500 GB
Model: AquaOxy 2500
The OASE AquaOxy 2500 (SKU 87103) is an outdoor pond aerator listed on the GB product page as suitable for ponds up to 25 m³. The GB page confirms a 5.0 m power cable, IP44 splash protection and a single air outlet, but key performance figures on the page are inconsistent (see limitations).

About OASE AquaOxy 2500 GB
The AquaOxy 2500 GB from OASE is a mains-powered pond aerator intended to supply compressed air into garden ponds. The GB product page specifies it as suitable for ponds up to 25.0 m³ (25,000 litres) and lists a 5.00 m power cable and IP44 splash-water protection, making it appropriate for outdoor installation. The unit has one air outlet and accepts hoses with 19 mm (3/4") and 9 mm connections. The GB page shows measured flow rates at specific immersion depths (46 l/min at 0.5 m, 40 l/min at 1.0 m and 32 l/min at 1.5 m), which give practical guidance about delivered aeration at typical pond depths. The product page also provides physical and supply details: dimensions 245 × 185 × 200 mm, net weight 8.1 kg, rated supply 220–240 V / 50 Hz, and a 2‑year manufacturer warranty. The page states there are no air stones included and that the unit has no mechanical adjustment (no user airflow control). The GB page uses the term “Unlimited” for outdoor suitability and notes IP44 protection. Important: the GB product page contains inconsistent flow information (see limitations). The page does not state electrical power consumption in watts or a maximum head in metres for this GB SKU, nor does it give distinct fish- or koi-capacity figures. For installation, maintenance and full safety instructions you should consult the product manual or the manufacturer’s technical documentation referenced on the product page.
Best for
Providing aeration/oxygenation in outdoor garden ponds up to 25,000 litres; manufacturer text references use with koi but no koi-capacity is provided.
Things to consider
The GB product page for SKU 87103 shows conflicting flow information: a listed maximum flow of 2,500 l/h and a separate line labelled “Flow rate – Q max.” = 3,180 l/h on the same page. Because this conflict is unresolved on the GB page, maxFlowLph is left null. The GB page does not state electrical power (W) or maximum head (m) for this GB variant, and it does not provide fish- or koi-specific capacity figures. Other regional OASE pages list different values (e.g. 40 W, 0.35 bar, 3,180 l/h, different net weight) but those refer to other regional SKUs and were not used here per the supplied research boundary.
Installation
GB product page lists the unit as suitable for outdoor use with IP44 splash protection. Supply rating is 220–240 V / 50 Hz. Connect to a single air outlet using 19 mm (3/4") or 9 mm hose as required. The unit has no mechanical airflow adjustment and no air stones are supplied (stones or diffusers must be provided separately). Consult the product manual on the manufacturer page for full installation guidance.
Maintenance
The GB page does not list maintenance intervals. The product carries a 2-year warranty. Refer to the product instructions/manual on the OASE product page for recommended maintenance and servicing details.
Safety
The GB page states IP44 splash-water protection and rated supply 220–240 V / 50 Hz. The page does not provide detailed safety or earthing instructions; follow the manufacturer’s manual and local electrical regulations.