UV Clarifiers clear green water which is caused by single celled green algae and prevent it from returning.

Usually the UVC will be the first piece of equipment after the circulation pump. On a pump fed filtration system this means the UVC will be installed before the pond filter, and on a gravity fed filter after the circulation pump that returns the water to the pond.

The length of the power cable for UK models is 2.2metres.

The 15,25,30,55 and 75watt models come supplied with 1.5" hosetails, you can also hard plumb using 1.5" BSP male fittings. You can find these fittings at the following links

single-union-threaded-male-to-plain-female

converter-threaded-male-to-plain-female

If you are plumbing to black pipe from a plumbers you will need adapters which you can find here

reducing-sleeves-imperial-pressure-to-waste-pipe

The 110watt professional UV has no fittings supplied. It requires 2" solvent weld pressure pipe which can adjusted to suit your personnel requirements.

Yes, bulbs and quartz sleeves are included in the box when you purchase an evoUV

No, we encourage the user to gain experience in fitting the UV bulb and quartz sleeve, as they will need to do it every year in the future when they replace old bulbs with new. There are fitting instructions included in the user manual.

Yes, never look at a lit bulb as it can damage eyes and skin. To check if a bulb is lit up, view the closed unit at night. UV protective fittings will glow in the dark, indicating that the bulb is connected properly, and working.

It’s a tube that looks like it’s made of glass, which separates the pond water running through the unit, from the bulb. It’s very delicate, like glass, and should be handled with extreme care. Quartz sleeves should be cleaned regularly to ensure that the UV rays can shine through it, and do their job on the pond water. A dirty quartz sleeve will negatively affect performance. If a quartz is cracked or chipped, it must be replaced.

evoUV adheres to UK pond equipment laws, and requires that it is wired into a safe, compliant, outdoor electrical system, ideally with an RCD cut-off. If you are unsure, consult a qualified electrician.

Check that bulb is connected properly, and that the unit is wired in correctly, and on. UV should be on for 24 hours per day. Consult the recommended flow rates on the packaging. If water flow through the unit is too great, the contact time with the UV rays may not be long enough. Slow down flow with a controllable pond pump, or a ball valve. Check the pond volume calculation to enure that you have the right size of unit. If unsure, always go bigger. Check the age of the bulb. A UV bulb needs to be at its most effective from March until September in the UK. Install a new bulb every March. Always combine UVC with effective mechanical filtration, to remove debris which would otherwise shade the bulb, and to capture dead and damaged green algae cells after they’ve been exposed to the UV.

Evolution Aqua distribute and recommend Osram, a world leader in UVC technology. Obtain these from an authorised Evolution Aqua dealer.

Yes, all The evoUV clarifiers are suitable for saltwater, the Aquarium UV Sterilizer is made specifically for marine aquariums and is available in 15 and 25watt versions with additional fittings for connection to typical aquarium circulation pumps, however if you require a larger unit all the pond clarifiers are suitable for saltwater.

You can follow the step by step instructions located in the manual below or you can watch our YouTube video here:

evoUV Manual

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. Mechanical filtration is necessary.

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? Unscrew the end caps and ensure correct fitting as per the instructions as described in this manual.
• Are the end caps dry? If not, allow to dry thoroughly. We recommend the use of a hair-dryer for this.

Quartz sleeve may have become dirty and requires cleaning. 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.

This could possibly be caused by an incorrectly fitted, damaged or overtightened O-Ring on the quartz sleeve. Please check the quartz sleeve O-Ring, reposition it or if necessary replace it with a new one. Follow the steps on page 14 in the manual to test. To view the manual, click here.


IMPORTANT: Do not fit the bulb socket or end cap until the issue is solved.

If water enters the bulb socket it can cause irreparable damage to bulb socket and ballast. Damage caused by improper fitting of the quartz sleeve, o-rings and locking nuts are not covered under warranty.

The key thing is to make sure the UV is never turned off. The unit could be wrapped in loft insulation and then a waterproof membrane if you live in a very cold area.

The inlet and outlet can be installed either left (Inlet) to right (Outlet) or right (Inlet) to left (Outlet).