Of course you don't see it working but the results speak for themselves, from green to almost crystal clear water in my fish pond ( i can see the fish) within two weeks. Great value and far cheaper than keep purchasing chemicals to attempt to get the same result, which you never do, So good for the environment, good for the fish and good for me, and my wallet.
Verified purchase: Yes | Condition: New
I change the UV lamp in my pond filter every 12 months. I examine the filament area of both ends and usually find little evidence of deterioration with these lamps. It's important to change them at least every year as, once they start to deteriorate, they can actually promote the growth of algae even though they look to be working ok. As long as you do change them every year you should have no worries with this product.
Verified purchase: Yes | Condition: New
I got 2 lamps for the price i would have paid at the fish farm. The size chart helped to get the right one.
Verified purchase: Yes | Condition: New
Verified purchase: Yes | Condition: New
Works and lasts for a year
Verified purchase: Yes | Condition: New
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