UV filter pump placement on a pond???

[Mr Cob]

I have a 1000gallon pond that I'm redoing.

I just purchased an out of pond filter, UV, and two pumps.

My questions:

1) Do I place the UV before the filter or after? I'm thinking after.

2) Also if the UV is after the filter does my second pump go before or after the UV? I would say this is an easy one and it would go before the UV and after the filter.

So.....Pond, Pump, valve, Filter, valve, Pump, valve, Uv, pond

3) I'm also installing pvc control valves for control of everything but my UV manual says not to install pvc valves from the aquarium to the Uv.??? "Huh?" is what I said! Any one know what this means???

[Mr Cob]

Where you at Ray and Erik??? This is basic Aquarium 101 with a twist.

[jc]

So you are going to use two pumps in line with each other?

[Mr Cob]

So you are going to use two pumps in line with each other?

Is that a bad idea? I mean I need a pump for the filter and one for the UV filter right???

[LoneStar]

You shouldn't run two pumps in line with each other.

One should sufice, if it is rated high enough to run your filter. As for connecting UV's, if you have it on the exit side of the filter, it will help prevent detritus or stuff in the water column from getting inside and clogging the UV filter. Check the minimum and maximum gph recommended for the UV. If the exit flow (gph) from your filter is within range for your UV, then let gravity run it through your UV back to your pond. If it is not enough flow, you need a bigger pump (but not one that is too big for your filter).

OR

Just run one pump for your filter and the other pump for your UV seperately. Its very important to check the gph recommendation for the UV. Too much or too little and it ain't gonna do squat for you! ....since you won't have the correct amount of contact time.

[Mr Cob]

You shouldn't run two pumps in line with each other.

One should sufice, if it is rated high enough to run your filter. As for connecting UV's, if you have it on the exit side of the filter, it will help prevent detritus or stuff in the water column from getting inside and clogging the UV filter. Check the minimum and maximum gph recommended for the UV. If the exit flow (gph) from your filter is within range for your UV, then let gravity run it through your UV back to your pond. If it is not enough flow, you need a bigger pump (but not one that is too big for your filter).

OR

Just run one pump for your filter and the other pump for your UV seperately. Its very important to check the gph recommendation for the UV. Too much or too little and it ain't gonna do squat for you! ....since you won't have the correct amount of contact time.

LoneStar,

Thanks for the detailed reply.

I have a new mag 5 and mag 7. My biological filter is rated up to 500gph and the UV is rated at 300-500 gph. The mag 7 is rated to deliver 700gph but going up 2 foot it's rated at 550-600.

Will the Mag 7 suffice alone for both filters?

I could also do your alternate recommendation and run the mag 7 on the filter with a control valve if it's too much flow. Then run the Mag 5 on the UV which is rated at 400-450gph. I'm worried that the mag 5 will be too much for the UV though....??? I have the 9W Turbo Twist 3x pond clarifier.

FYI: I'm also running a mag18 on two fountains.

Thanks for everyon'e help in this matter. I'm so glad that I asked...I would have done this wrong!

[Bill S]

The mag 5 is probably fine for the UV, and the 7 for the filter. By the time you lose flow from going up 2 feet and due to internal friction, you are probably around 500gph. You can always check it using a bucket and a calculator.

[Mr Cob]

The mag 5 is probably fine for the UV, and the 7 for the filter. By the time you lose flow from going up 2 feet and due to internal friction, you are probably around 500gph. You can always check it using a bucket and a calculator.

Great. Thanks Bill, I appreciate your response. I'm going to go with that.

Thanks for saving me time and money guys!

[Mr Cob]

Ok,

So here's what I have.

Pond/Mag 7 > Control Valve > Bio Filter > Pond

Pond/Mag 5 > (I want a control valve here, the manual says no.) > UV Filter > Pond

Pond/Mag 18 > Control valve > Main Fountain > Small fountain (the plumbing here is already down and hardlined from previous owner, the valve controls how much pressure goes to the small fountain).

Anyone see any problems here, and what's the big deal with adding a control valve on the tubing with the UV???

Thanks.

[jc]

I don't see a problem with using a control valve on the u.v.