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Water Purification


Activated carbon is a chemical filter media which soaks up dyes and discolouration from the water. Over time the water will turn yellow from biological processes, fish food, fish waste, leaves and dead algae, so add some activated carbon to your filter and it should return your clarity to that of tap water. Place it into a net bag first though so it doesn’t escape from the filter and flow back into the pond.

Ultra Violet Clarifiers are purpose-built to destroy the unicellular algae that cause green water in ponds. You cannot overdo the amount of UV you have on a pond but you can underdo it, and have too high a flowrate for it to be effective. So choose a large UVC model and make sure that your pump is pumping under the maximum flow rate for that size of UV. Run it 24 hours per day, change the bulb every 6-12 months depending on make and model, and keep the quartz sleeve clean too.

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