How can I tell if the unit is working?
The end caps will glow when the unit is operating correctly. In strong sunlight this may not be apparent, but at night
and at low light levels the glow is easily detectable.
How long after I install the unit will my pond become clear?
There are many factors which control this, including the levels of nutrients available to the algae, the water tem-
perature and the level of sunlight.
Assuming that the correct size unit has been properly installed most ponds should clear within 3-14 days. However,
please allow a full six week period for the unit to take effect.
The lamp is not working. What is wrong?
First check the power supply and the fuse. Check that the white electrical end caps are correctly located on the
lamp pins. If it still doesn't work, remove the lamp (as detailed on the previous page). Check that the lamp and the
quartz sleeve are not broken. Remember to switch off the electricity and water supplies before carrying out any
maintenance on the unit.
The unit worked well when I first installed it but recently my pond has gradually gone green again – what
is wrong?
This usually indicates that the quartz sleeve has become dirty and requires cleaning (read maintenance instructions).
Also make sure you have the right model for your pond size by checking the table in this leaflet.
Does a Pro Clear Ultima unit put anything into the water, and will it harm anything living in the pond like
frogs, newts, plants or fish?
Ultraviolet lamps leave no residues, and only affect the water pumped through the unit. Unlike many chemical
treatments, your Pro Clear Ultima unit will not harm the plants and animals living in the water.
How long can I leave the unit running?
Pro Clear Ultima units should be run 24 hours a day, every day, from mid March to early October, depending on the
weather conditions. If the unit is frost protected it may be left running throughout the winter. Otherwise, the unit
should be removed, drained and stored safely for the winter.
Can I use my Pro Clear Ultima unit if I am using any treatments for my fish?
From our own experience of using a wide range of treatments and medications, we have found no harmful effect
from running Pro Clear Ultima units at the same time as treating a pond, although some medications may be broken
down a little quicker than normal.
Always check the manufacturer's instructions before using any water treatment.
Can I bury the unit underground?
NO. Do not bury the unit. It could become waterlogged at a later date, which would be dangerous.
Large fish like Koi can cause murky water by stirring up the bottom of the pond.
TROUBLE SHOOTING
This murky water should not be confused with suspended algae.
GENERAL NOTE
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