Clear water with low microbiological contamination thanks to UV-C water clarifiers
UV-C water clarifiers offer you the opportunity to clear white and green water cloudiness, using a physical process without the need for liquid chemicals. Moreover, it has also the property to efficiently reduce the germ count (e.g. pathogens).
How does a UV-C water clarifier work?
UV-C radiation is the radiation range between 200 and 280 nm, which lies below the UV-A and UV-B radiation and is not visible to the human eye. UV-C radiation has a germicidal effect and therefore is used for the clarification of water. The water flows with medium speed along the lamp which emits UV-C radiation. During the contact time in the UV-C radiation germs and floating algae are killed. The JBL ProCristal UV-C PROCRISTAL water clarifier has been designed so that the thickness of the water layer and the bulb efficiency give you perfect results. To optimise performance, the pump flow rate must precisely match the size of the UV-C clarifier.
Reducing the germ count
Alongside clearing green water (floating algae) UV-C clarifiers are often used to reduce the germ load in aquarium water. Passing the UV-C bulb, all germs are killed off and caught by the downstream filter. Here you also need to be careful that the pump performance is adapted to the purpose and performance of the water clarifier (see table).
JBL ProCristal UV-C PROCRISTAL water clarifier contain an internal glass cylinder which needs to be cleaned twice a year. This is not complicated and can be easily be carried out by people who are good with their hands. It only takes a few minutes to unscrew the unit. Care should be taken when using a device with plastic inserts not to scratch them.
Replacing the UV-C bulbs
After about 6000-8000 h (often after about one year) the UV-C effect of the bulb decreases considerably and with it its clarifying and germicidal effect. You then need to change the bulb. You can easily do this yourself. Just open the housing and unclip the bulb from its fixture. Put in the new bulb without touching its glass surface (use cloth or paper). Put both halves of the housing together again – that’s it! JBL offers you high-quality JBL Replacement lamp UV-C from 5 up to 55 W.
Increasing the performance
If you want to get a larger aquarium or if you just need a higher output for your UV-C water clarifier, you can connect up to 2 units together. For that purpose, JBL provides you with a special connection piece: JBL PROCRISTAL UV-C QuickConnect .
Installing the UV-C device in front of or behind the filter?
Ideally install a UV-C water clarifier IN FRONT of the filter. Then the downstream filter can catch the dead germs and algae and they can be completely removed from the water the next time you clean your filter.
But if your filter is new or has recently been cleaned the UV-C water clarifier would obstruct or delay the biological settlement of your filter. In this case it would be useful to connect the clarifier for three weeks BEHIND and afterwards IN FRONT of the filter.