I was happy with this unit, seemed like a sane and useful design, however it failed at around 4 weeks of operation. If I am able to get warranty service, or otherwise the issue resolved I'll update this review but right now I can't recommend it.At 4 weeks or so the control box red light went out which should indicate the UV lamp needed replacing. That's terrible but I wondered if that might not be just a defective light, etc. I just went ahead and purchased a new lamp, figured I'd use it in the long run regardless, however the control box indicator light is still out so that's not it, apparently the 'control box' has failed. I'm attempting to get warranty service from the manufacturer because I'm over the 30 day return policy.
I'm very pleased with the unit. I needed a UV filter for a smaller tank with a hanging filter (so an in-line wouldn't work) and was very happy to find this at a great price. It's whisper-quiet and includes a power head for great circulation.
Two small words to the wise:
1) The product is a snap to set up if you're a little mechanically inclined because the instructions that come with it leave something to be desired. The illustrations are microscopic and the text says to see illustrations that don't exist.
2) Make sure you look at ALL the photos before you decide to put this in a smaller tank (20 g or less). It takes up more room than the main picture might lead you to believe but is rated up to 50g.
With that said, I would heartily recommend this to anyone who's ever dealt with an algae bloom (or anyone who doesn't want to).
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The Green Killing Machine 9 watt worked wonderfully for the first three months I owned it. Water was crystal clear, and even if the submersible part of the unit was big and bulky it was worth disguising to have such a trouble free aquarium.Then, despite weekly routine cleaning and maintenance as suggested per the manual, the charging unit stopped working. Only it didn't just short out. It fried itself and burned so hot that it melted through the plastic housing before I caught it. I don't know if and when the little red light went out; it's simply not something most people check on a daily basis. What I do know is that the problem could have been seriously compounded had the unit continued to smoulder.
Based on the potential for danger and the fact the unit eventually stopped functioning beyond repair, I can't recommend it at all.
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I put one of these in a 55 gallon tank. During this time of the year the sun comes through one of the windows at about 8AM and turns my tank into an algae heaven. My tank went from bad to worse waiting for this to show up. I let it do its thing for a few days to make sure it would actually make a difference before performing a water change, and it really does. My tank wasn't crystal clear but I could see from one end to the other again today, which was not possible through the pea soup a few days ago. I just did a water change, and the water is pretty clear now. I expect this will keep things in check and keep the water quite clear, especially during the rest of the year when I don't have this issue. ++ item.Want Green Killing Machine Internal 9 Watt UV Sterilizer with Power Head Discount?
Two of my kids tanks turned green while we were away on vacation. I think our neighbors overfed the fish. Anyway, after chasing the algae blooms on the 5 and 10 gallon tanks without success (repeated cleanings and water changes), I purchased the Green Killing Machine. After 48 hours in the pea-soup green 10 gallon tank, the water was noticeably cleaner. After 72 hours, the water was crystal clear. Then I transferred the unit to the 5 gallon tank. After 48 hours, it too is crystal clear.If you have an algae bloom, this is your ticket.
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