What precautions do I need to take?

Before installation or maintenance, or before putting your hands into the aquarium, remove the power supply from all the electrical devices under water. Read the instructions.

Before installation

Check that all the components of the product are undamaged, disconnect all the electrical devices and make sure the voltage of the product corresponds to the mains voltage.

What is the purpose of the product?

This is an aquarium pump for internal use only, with water of a temperature of up to 35°C (95°F).

Is the transformer the only difference between the Koralia Standard and the 12V?

No, the difference lies in the possibility to control flows that the Koralia 12V offers compared to the normal 240/115V pumps. While the mains voltage versions operate with a set number of revolutions, the 12V versions have been designed to be run by a complex control system, which operates on V/F parameters to regulate the voltage and frequency of the power supply, making it possible to change the speed and quantity of the flow depending on the input provided by a particular program.

Where can I connect the Koralia 12V?

To Wavemaker control modules. There are two models available, the WM2 and WM4. The WM2 model can run two pumps (even different ones), and uses a simplified pump management program. The MW 4 model can run up to 4 pumps (even 4 different ones), and is a professional product that allows for the fine management of the operation of each individual pump connected. 

Do I have to be careful with the ultra-powerful rare-earth magnets?

Absolutely. In addition to the risk of catching your fingers because of the high level of magnetic pull between the two parts of the support, these parts may attract blades, sharp objects or other magnets, causing accidental injury. Magnets can also cause permanent damage to electronic equipment (e.g. LCD screens) and other objects sensitive to magnetic fields, such as heart pacemakers, credit cards and keys. Always keep a distance of at least 30 cm (12 inches), and always keep out of the reach of children.

What thickness of glass can the magnetic support of the Koralia 12V be used on?

It depends on the model: up to 15 mm for the 3300 and 6000 models: up to 20 for the 12500 model (3/4 inch).

What maintenance operations does the Koralia 12V pump require?

Maintenance consists of cleaning the motor and the rotor, and if necessary removing the limescale that normally builds up in reef aquariums.

Can I connect the Koralia 12V to a transformer?

Hydor has not envisaged this option, because the pump would behave in the same way as 240/115V pumps, so it would simply represent an additional cost without any real advantages for the consumer (240/115V pumps have achieved excellent safety standards).

My aquarium is very large; how long are the power supply cables?

The cables are 3 metres long, but if necessary a 2-metre extension cable can be used.

I feel it's a shame to remove the calcareous algae from the pump…

Attractive as they may be to look at, limestone formations on the pump can affect performance, and can cause the impeller to malfunction, with start-up of the rotor in the wrong direction. Problems with the impeller wearing out have also been reported as a result of continuous contact with this kind of limestone formations.

What kind of "decalcification" product should I use?

NEVER use chemical products for ovens, cookers or washing machines! Use only vinegar or lemon juice, or muriatic acid, with particular caution.

My Koralia 3300/6000 is clean, but it starts up in the wrong direction.

Check that the black starter rubber is in its place, in the front chamber of the pump.

My Koralia 12V is perfectly clean and starts up without any problem, but it vibrates and is noisy.

Check that the front chamber of the pump is fixed/screwed in correctly.

How should I schedule maintenance operations?

Maintenance operations should be carried out with the following frequency: A) Once a month for the rotor, inner pump body, bushings and O-ring (if present): B) once every three months for the grids on the upper and lower chambers.