Instruction manual

TROUBLE SHOOTING

My pond water is not clear, is this due to the evoUV not working correctly?

Koi, goldfish and other pond inhabitants can cause murky water by stirring up the

bottom of the pond. This murky water should not be confused with suspended algae.

Always check all your pond filtration is working and is being maintained correctly

prior to checking the evoUV.

If the UV bulb is not lit, then you need to investigate the power to your unit.

• Has your RCD tripped? If yes, check your wiring and reset.

• Examine the UV bulb for signs of failure, and replace if necessary.

• Is the UV bulb fitted correctly? Making sure that the power to the unit is turned off,

unscrew the end caps and ensure correct fitting, and switch power back on.

The unit worked well when I first installed it but recently my pond has gradually

gone green again – what is wrong?

Quartz sleeve may have become dirty and requires cleaning (see page 14). Also

make sure you have the right model for your pond size. Ensure your pond filtration is

removing fish waste and debris efficiently. Dirt in ponds will affect the efficiency of the

evoUV. Check that your pond water volume is pumping through the evoUV every 2 to

3 hours.

Only after you have carried out these checks should you contact your Evolution Aqua

dealer, who will then be able to advise you further.

FREQUENTLY ASKED QUESTIONS

How often should I change the UV bulb?

The evoUV bulb has an effective lifespan of 9000 hours, but it is an accepted

practice to replace a UV bulb once a year, at the start of every pond season.

How long after I install the unit will my pond become clear?

There are many factors which affect how long your evoUV will take to clear your

pond, such as the levels of nutrients available to the algae, the water temperature

and the level of sunlight. Assuming that you have installed the correct size unit, most

ponds should clear within 3-14 days. However, this may take up to six weeks in some

instances.

Does the evoUV harm fish, plants or wildlife?

Ultraviolet bulbs leave no residues, and only affect the water pumped through the

unit. Unlike many chemical treatments, your evoUV will not harm the plants and

animals living in the water.