UV or No UV

[saycheessee]

What is everyone's thoughts about using a UV on a pond 20x25.  I have the Savio skimmer and savio livingpond waterfall filter.  I would need either the 25 or 50 watt uv.  What is everyone's suggestion?  I don't want to spend that type of money on a uv if it isn't going to help.

 

[Bonnie]

I don't know how many gallons your pond is but a 25w wouldn't be big enough for a 20x 25 ft pond.   50 Watt is what would be recommended for approx 5,000 Gallons.
They can be overrated so beware... if you don't get one big enough, it won't do the job.

So far I've loved my UV's!  I normally only use mine for the first two months until the filter catches up, then turn it back off.

[CT]

I wouldn't be without UV. I tried to not use it on my lily pond and I couldn't see the fish. It was pea soup green most of the summer. It's worth the money to me.

[Monica]

I totally agree I love mine and wouldn't have a pond without one.

[laurw]

My pond would be a pointless waste of time without the UV filter. I wouldn't see anything but green pea soup in there except for a few weeks of the season.

[Ky Kim]

I love both my UV's.  Wouldn't be without one.  Pond season is too short to wait for it to cycle.  I want to be able to enjoy looking at the fish instead of pea soup.  AZPonds has good prices on them.  Alot of times they have free shipping too.

Kim

[Rocmon]

I have the same filtration set-up you have. I don't use UV. My fish load is minimal—GF, minnows, mosquito fish. The first year just as it looked to be getting green it cleared up. I would suggest you beef up your filtration before getting UV. UV kills the algae but doesn't remove the nutrients that make them grow in the first place.

In my skimmer I've added six 14" black night brushes 3 per side. I also added an additional mat in the pump area—my pump is external.

In the biofilter I added a 6" high roll of blue Matala (have to trim it a little to fit in the Savio) on top of the springflow. I've also added more nylon strapping and more generic mat.

This is how the skimmer looks:
http://www.koiphen.com/forums/showthread.php?t=47378&highlight=skimmer+modification

[Bonnie]

I have the same filtration set-up you have. I don't use UV. My fish load is minimal—GF, minnows, mosquito fish. The first year just as it looked to be getting green it cleared up. I would suggest you beef up your filtration before getting UV. UV kills the algae but doesn't remove the nutrients that make them grow in the first place.

In my skimmer I've added six 14" black night brushes 3 per side. I also added an additional mat in the pump area—my pump is external.

In the biofilter I added a 6" high roll of blue Matala (have to trim it a little to fit in the Savio) on top of the springflow. I've also added more nylon strapping and more generic mat.

This is how the skimmer looks:
http://www.koiphen.com/forums/showthread.php?t=47378&highlight=skimmer+modification

I disagree..

More than likely you run your filtration all year long in your zone.. 
Some of us experience algae blooms because of this and our ponding season is shorter and we need a UV to help out until our filtration system catches up.

It might be a temporary band aid but it's well worth it..

[Rocmon]

Yes I run filtration all year long. My water temperatures dropped to 35* this winter. The biobugs don't do anything to convert ammonia, nitrates and nitrites at these temperatures. I would guess I have a clean water because I have a minimal fish load—no koi. I can spend many hours a day stirring up the gunk in the water working crud to my BD and then washing brushes and mats—several times in a few hours when I'm really working at cleaning it.

My argument against UV is it does absolutely nothing to remove the nutrients that cause green water to grow. It's like adding HP to your pond to kill string algae. It's a quick fix that doesn't solve the problem. Additionally it is an indiscriminate killer of anything in the water—anything that would be sensitive to UV—good or bad things. The pond is a living organism, I don't think killing anything that happens to float by is a good thing. In my mind I'd prefer to treat the disease than the symptoms. Treating the symptoms may make you feel better but the disease continues. Fix the disease and your done, no more band-aids.

I don't have experience with ice covered ponds, and maybe no amount of filtration can solve the green water issue. I would think that increasing filtration would be a good thing. It is less expensive than UV and certainly worth trying before spending money for equipment that may not be needed. It's just my opinion to someone with a similar pond filtration set-up as I had. I know when I posted, that everyone else was pushing UV, just wanted to offer an alternative to the status quo. Many people inadequately filter their ponds IMHO and then they wonder why their water's not clear.

Brushes and Matala about $100, floor scrubber pads would be even cheaper than Matala. UV is $250 or more, plus electric costs, replacement bulbs... Two generic pads and a roll of Springflow is not much filtration in my mind, that's why I beefed mine up. A bottom drain wasn't mentioned either.



                                                                                              

[billyk]

Cleaning media in my waterfall filter and skippy. When and How?

[Michiponder]

Gotta agree with Rocmon on this one.  Have had several ponds over many years of ponding and have found that UV is no match for enough bio filtration.  Yes UV does work.  No it does not cure the cause of the algae bloom.  I live in MI and do not get a bloom even in spring unless I screw up and kill or or set back the bio filters in some way.  Keep in mind that I use large bio filters though.  On one 1600 gal system I just removed after 18 years the bio filtration was nearly 200 gal.  On another 4,000+ gal. pond I use four 55 gal. barrels of media for part of the filteration.  A 2,000 gal. system here has had as many as 6 milk crates of media in a trickle tower biofilter and usually will not even grow string algae even with high fish loads.  Regular partial water changes also help.  Most people do not want to put in biofilters this big.  Space and the apearance of the water garden along with filter maintenance and cost are also issues.  If all you want is clear more sterile water and are not concerned about nutrient buildup, UV can be a great way to go too.

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