UV clarifier -need help

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Greetings!
I have a 5 year old 700-800 gallon pond with a 3-4 foot waterfall. The skimmer/filter box has a pump that pumps the water to a waterfall box at the top of the falls where it goes thru 2 more layers of filter.
I have 2 red earred slider turtles who devour any type of water plant I have tried, so I have pretty green water from algae. I was given a 20watt pondmaster UV clarifier to try and I would love some advice!
I have a 2nd pump ( 1000 gph) that I placed in the waterfall box and connected the UV light to it. I have a temp hose connected to uv outlet that runs down the waterfall.
My 3 questions:
1) is the 1000 gph pump too powerful for UV effectiveness? If so, can I put a valve between the pump and uv light to decrease flow rate without damaging the pump?
2) how long should it be before I see the water starting to clear?
3) the pondmaster UV unit wasnt marked for input or output...does it matter which end I connect the pump to?
Thanks bunches for reading and any advice you may have for me.
 

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Meyer Jordan

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According to Pondmaster. for clarifying this UV will handle flow rates up to 1800 gph. However, the lower the flow rate the more effective a UV is. You should get good results with the 1000 gph pump.
 
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According to Pondmaster. for clarifying this UV will handle flow rates up to 1800 gph. However, the lower the flow rate the more effective a UV is. You should get good results with the 1000 gph pump.
Thanks...that is why I purchased the pump, but 30 hour later no good results!
 
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sissy

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usually on u.v.s the water goes in the top part where the power cord is and comes out thee bottom where there is no cord
 
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Yes you can add a valve to slow the rate down and I would do so. No it doesn't matter which end the water enters or exits. You should see results in a few days if not either the water is going too fast or the bulb is old and needs to be replaced. If the light is on 24-7 then it should be replaced every year.
 
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Yes you can add a valve to slow the rate down and I would do so. No it doesn't matter which end the water enters or exits. You should see results in a few days if not either the water is going too fast or the bulb is old and needs to be replaced. If the light is on 24-7 then it should be replaced every year.
Thanks!
 
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Brand new! I am currently traveling and will post results from pond clarifier when I get home later today. Thank you
 
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Yes you can add a valve to slow the rate down and I would do so. No it doesn't matter which end the water enters or exits. You should see results in a few days if not either the water is going too fast or the bulb is old and needs to be replaced. If the light is on 24-7 then it should be replaced every year.
Thank you for the answers to all my questions! Much appreciated. Bulb is brand new. I am currently out of town but will let you know the results when I get home later today
 
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This is how it looks today...clearer, but still a little green.
 

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