OASE AquaMax Eco Classic pump series is more popularly known as the Powerful Classic range. The new design with a large surface wrap-around strainer allows coarse debris particles such as fish waste or dead plants up to 8 mm to pass through. The efficient OASE motor is particularly economical and hence offers a first-class price-performance ratio.
Features :

Inline or Submersible : Can be set up as underwater & dry installation
Can be coupled with Pressurised pond filter or Gravity pond filter or used standalone for Pond aeration.
Economical: The energy-efficient motor of the AquaMax Eco Classic saves electricity – and therefore money
Swimming & Natural Pools: Possible to use in an external pump vault
Up To 40 % Less Energy : The 2500 E and 3500 E require much less energy than the predecessor model
Hose Tail : The special hose adapter with threaded collar for different hose sizes (25/32/38 mm) included.
Ball Joint connection: The extremely versatile rotational ball outlet provides the ability to adjust the pump discharge to the perfect position needed for water feature set-up.
Environmental Function Control: This is EFC, by OASE: no problems caused by the pump being blocked or running dry
Large Solids Handling: Reliable conveying of plant parts or fish faeces up to a size of 8 mm
Easy maintenance: Simple pump cage clips make it easy to open the protective pump cage to perform pump maintenance or remove debris.
Stable shape: The wide, flat shape of the pump cage makes it stable and easy to place in the pond.

Specifications :

Dimensions (L x W x H) : 280 × 230 × 140mm
Rated voltage : 220 – 240 V / 50 Hz
Power consumption: 80W
Power cable length: 10m
Net weight: 4.4kg
Max. flow rate: 8300L/hr
Max. head height : 3.20m
Hose connection : 25 / 32 / 38mm
Filter intake surface: 810 cm2
Max. coarse debris displacement: 8mm
Electronic flow adjustment: No
Guarantee (+ request guarantee) 3 + 2 years

Recommendations:

To maximize pond circulation, locate the pump as far away as possible from the location of the water entering back into the water feature.
The pump cage is designed to protect the pump from large pond debris that could clog or damage the interior of the pump. The pump cage will clog over time and should be cleaned regularly to ensure strong water flow. Failure to maintain the unit will result in a burnt out motor and other damages to the filter unit.
Frequency of the pump cage maintenance depends on the volume of water and number of fishes / turtles in the pond. Filter cage should ideally be cleaned using a bucket of pond water.

What is the difference between Caged & Uncaged Pond pumps:
Both caged and uncaged submersible pond pumps are commonly used in aquaculture and pond management. Here are some key differences between the two types of pumps:
Design: The primary difference between caged and uncaged submersible pond pumps is their design. Caged pond pumps are typically encased in a protective cage or housing that prevents debris, leaves, and other particles from clogging the pump intake. In contrast, uncaged submersible pond pumps do not have a protective cage and are more susceptible to clogging.
Maintenance: Caged Pond pumps are generally easier to maintain than uncaged pond pumps because their protective housing helps to prevent clogs and debris build-up. Uncaged pumps may require more frequent cleaning and maintenance to prevent clogs and ensure proper water flow.
Price: Caged Pond pumps are often more expensive than uncaged pond pumps due to their protective housing and design features. However, the added cost may be worthwhile in terms of reduced maintenance requirements and improved pump performance.
Efficiency: Caged Pond pumps are generally more efficient than uncaged pond pumps because their protective housing prevents clogging and debris buildup, which can reduce pump performance and energy efficiency.
Flexibility: Uncaged Pond pumps may offer more flexibility in terms of placement and installation because they do not have a protective cage or housing that restricts their positioning. Caged pond pumps may be more limited in terms of placement options due to their protective housing.
Overall, the choice between a caged or uncaged submersible pond pump will depend on several factors, including the size and type of pond, water quality, maintenance requirements, and budget. While caged pond pumps may offer some advantages in terms of efficiency and maintenance, uncaged pumps may be more flexible and cost-effective in some situations.