Using pond uvc as a uvs?

[Jez1992]

I need a larger uv for my new tank, is approx 1500L so want 50-60w.

in UK no one make any UV sterilisers for tanks larger than 25w, such as the Vecton 600. I have one currently, but would rather 1 larger unit, than 2 smaller ones.

If I buy a pond uv clarifier, but run a much slower flow rate, would it be the same result.?

I'm looking at the 55w one below and the instruction manual says its a class 1 uv and uses same bulbs as smaller ones so surely would be same result?

Thanks

 

[kendragon]

Yes, that would work. It's all about the wattage. 55W for that tank size is perfect. Turn 1500L per hour or greater for maximum performance.

 

[Jez1992]

Yes, that would work. It's all about the wattage. 55W for that tank size is perfect. Turn 1500L per hour or greater for maximum performance.

brilliant, thanks.

I did a bit of research yesterday and it said the distance between the bulb and back of tube is wider on pond ones (presumable to allow higher flow rate) than tank units so doesn't kill parasites as good as are further away from bulb.

do you know of this is correct, or whether running at slow rate would be efficient?

thanks

 

[Jez1992]

I guess that link shows we,re right, they're the Aqua uv ones in U.S., can't get them here, but it clearly shows how can be used for whatever by altering flow rate.

http://www.aquaultraviolet.com/products/uvsterilizers/classic/57watt

 

[kendragon]

Evo is trying to be unique in their design.

Conventional designs have the lamp in the center of the chamber forcing the particles to be as close as possible to the lamp. The highest UV dosage is adjacent to the quartz sleeve.

The Evo chamber is not concentric which allows some particles to flow through with less dosage (further away from the lamp). Also, the chamber has baffles inside the flow which allows pathogens to hide behind. This may be their effort to get more flow as you mentioned but in my mind the inlet and outlet sizes will restrict the flow rate.

As I stated, the wattage is key. If you have enough wattage for a particular tank size it doesn't matter if you have a high flow rate. It just means you are pulling the pathogen into the chamber more often. If the wattage is not high enough, reducing the flow in attempt for a higher dosage is not going to work. Pathogens need to be pull into the chamber for the UV to be effective. Reducing flow defeats this.