UV-C wattage per litre??

[fishboi]

hello everyone i am reasonbly new to this site and everyone has been really helpful so start first by saying THANKS!!

now to the subject just wondering whats the rule when it comes to UV-C light wattage per litre and what ups and downs have ppl found with their own set up.

i was running a 9watt built in the filter on my 8000 litre pond and it was doin ok but not great and recently the light chamber had cracked!! killing 4 large oranda instantly before the safety power switch kick in to action . no idea how but was told i they couldn't find the replacement part so i am now looking at getting a separate UV-C system.

i've heard 2 watt per 1000 litre but that means i would need a 16watt and they retail for over $350 and then change of bulb every 6 month which i know for a 9 watt cost $80. there must be a cheaper way.

[Luke*]

Hi Fishboi, yes it is a great site isn't it? Where abouts in NZ are you from? Do you want to add it to your profile perhaps? I don't know much about the UV sterilisers, just that the longer the contact time the water has with them the better. I just wanted to ask how good you found it? Did it keep your pond totally algae and disease free? When you say it was doing okay but not great, what could have been better?

Cheers

[fishboi]

i am up in auckland which i am pretty sure its showing under my user name, is it not?

yep the UV-C keeps the pond water clear as a whistle :lol: :lol: but still have algae on the sides and subtract of cause. as for disease it kills all free swimming parasites such as white spot and fluke so never had a problem except for dropsy and swim bladder problems.

it could be better in the sense when the summer comes around the water tends to get a little murky with the green soup effect.