UV filters are really necessary in a tank. It’s been debated on time and time again, but no one has really come down to a “yes” or “no” answer.
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The UV light supposedly kills pests and disease pathogens that may be in your water.
This sounds great, but don’t expect it to kill all of them. There is still a huge chance that the pests will survive, rendering the UV filter useless.
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It’s totally up to you, on wether you want to get the UV filter or not.
Me personally? No, I wouldn’t get it - seems like a waste of money to me.