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UV filter for killing green water

1040 Views 1 Reply 2 Participants Last post by  DutchMuch
Looking for a good and not expensive UV filter for 400L planted aquarium.

Any recommendations?

Secondly, Should I keep it working just to the period of killing the green water algee? Or it important to keep it all year working ? (4 hours a day)

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Green killing algae machine product

best cheap UV brand available currently.
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