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Old 01-04-2010, 1:07 PM   #21
Raz0945 Raz0945 is offline
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Thank you for the information! It is very helpful.

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Old 01-04-2010, 9:31 PM   #22
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Agreed...very good info!!

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Old 01-04-2010, 9:50 PM   #23
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Yeah- what he said - I don't think I'd ever consider running a UV from a return pump, except maybe in a small system. Just use a powerhead to power the UV.
I guess I didn't ask the question right..

case in point:

I've got a UV that will require 30 gph for the exposure to kill ICH, what size aquarium is that sufficient on? will it work on a 90 gallon aquarium, where it will theoretically treat 1/3 of the water column every hour or should that UV be used on a much smaller system like a 30 where it will treat the entire water column every hour..
?

(did I do a better job of asking it that time?)

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Old 01-04-2010, 9:54 PM   #24
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I think he said that 1x turnover per hour is what you want, so it'd be sufficient for a 30g aquarium if the 30gph is the rate calculated to kill ICH AND that is the reason you're using it.

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Old 01-04-2010, 10:35 PM   #25
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Right - I wouldn't recommend going over a 30g tank for that size UV...
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Old 01-05-2010, 8:48 AM   #26
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Right - I wouldn't recommend going over a 30g tank for that size UV...
for killing ich, anyway...

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Old 01-05-2010, 12:26 PM   #27
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I have a older aquanetics q25il. Only thing I have been able to read is 45,000 uWs/cm2 at 250 gal/per hour, and 15,000 uWs/cm2 at 500 gal/per hour. The company is out of business. So, do you think this uv is under rated for a 150 gal. The label claims it is rated for a 150gal. But the #'s are not in check with your list.

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Old 01-05-2010, 12:29 PM   #28
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It also has 500 gal/per hour max. So maybe able to put a smaller pump? What do you think? I am running a 250 gal/per hour now.

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Old 01-05-2010, 12:30 PM   #29
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I have a older aquanetics q25il. Only thing I have been able to read is 45,000 uWs/cm2 at 250 gal/per hour, and 15,000 uWs/cm2 at 500 gal/per hour. The company is out of business. So, do you think this uv is underrated for a 150 gal. The label claims it is rated for a 150gal. But the #'s are not in check with your list.
The numbers won't be in check with my list - all manufacturers overrate their sterilizers.

In order to get 336,000 uWs/cm2, you'd need to push 33 gph through the sterlizer, so I'd rate it for a 30 gallon tank if you want it to be effective against Ich.
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Old 01-05-2010, 12:31 PM   #30
itsamyheff itsamyheff is offline
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Wow, thanks.

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Old 01-21-2010, 9:22 PM   #31
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What a great thread. One question that hasn't been raised yet:

What are everyone's thoughts on running the UV lamp 24/7 vs. say 8 or 12hrs a day?

I am thinking if you have an issue (ich/algae) run it 24x7 and then 8-12 to maintain the desired condition. Thoughts?

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Old 01-21-2010, 10:23 PM   #32
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Also, via the Emporer site - They seem to be targeting alge killing at 30,000 uWs and Protozoa 180,000 Ws/cm. If Ich death = 336,000 you would still need to cut their recommended flow for these sterilizers in half to accomodate that.

Unless you are really stressing your system with rock/sand changes or incorporating stress inducing animals, Ich seems to stay at bay for the most part. So you could go .5X turnover during any Ich situations and then 1x for normal day to day sterilization. For larger systems the difference between .5x and 1x can be $1000!

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Old 01-25-2010, 12:32 PM   #33
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data

Last but not least - interesting UV numbers from Emperor to compare against the original chart....Link.


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Old 01-25-2010, 9:59 PM   #34
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Thanks Oz. I wonder if their UV sterilizer's are any good. Any thoughts?

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Old 01-25-2010, 10:06 PM   #35
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Thanks Oz. I wonder if their UV sterilizer's are any good. Any thoughts?
Any good? These are the best units on the market..period.

These are what the pros use, and for good reason. I hated UV until I saw these in action. The other brands are just too weak to be effective. The emperor UV's are very powerful, emitting much more UV (2-3 times as much) as the competition.
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Old 01-25-2010, 11:16 PM   #36
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The other brands are just too weak to be effective.
This may be pedantic, but that's the point of this thread. UV is UV. Radiation is radiation. Different brands may be less efficient, but if you have the proper flow, they are just as effective.

I assure you that the DNA being broken up by UV radiation doesn't know or care if it's coming from an Emperor or AquaUV sterilizer, or if that sterilizer is efficient - only if there's enough power there to do it's job. How efficiently that's done is a different story.
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Old 01-25-2010, 11:37 PM   #37
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This may be pedantic, but that's the point of this thread. UV is UV. Radiation is radiation. Different brands may be less efficient, but if you have the proper flow, they are just as effective.

I assure you that the DNA being broken up by UV radiation doesn't know or care if it's coming from an Emperor or AquaUV sterilizer, or if that sterilizer is efficient - only if there's enough power there to do it's job. How efficiently that's done is a different story.
True, but are the other manufacturers delivering the power? I don't think they are.

It's tough to compare UV's without seeing and using them. I look at an Emperor 50w UV that's 6" in diameter compared to an Aqua UV 57w unit that's only 2" in diameter; that tells me that there's a big difference between the 2 units. Could it be that Emperor is making huge units to make them seem more powerful? Sure, I can't deny that possibility. But, I have seen and used many different brands of UV's and have hated them all. The only one that impressed me is the Emperor unit.

The same is present in car audio. Cheap amps are rated at very high wattages. High-end amps are rated at very low wattages. The high-end amps, even with their low wattage ratings, will out perform the cheapies all day long. I'm betting that if IASCA had a UV competition, we'd see the same thing with UV's

I see a lot of people waste money on undersized or underpowered UV's. Why? Because they're widely available and inexpensive.

I've wasted money plenty of times trying to save a buck. I've learned that you're going to spend the money one way or another; beit with fish loss or extra manual labor to keep the tank clean. So, if you have the chance to do it right, take it and do it right.

Now I'll add that I have not use every brand on the market.
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Old 01-25-2010, 11:41 PM   #38
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What advantage is a 6" PVC over a 2"? It seems like the 2" would keep the water closer to the UV lamp and would kill more stuff... maybe its just me? Honestly I don't even know if my UV does anything....I mean how do you test for that sort of thing?

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Old 01-25-2010, 11:46 PM   #39
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What advantage is a 6" PVC over a 2"? It seems like the 2" would keep the water closer to the UV lamp and would kill more stuff... maybe its just me? Honestly I don't even know if my UV does anything....I mean how do you test for that sort of thing?
It shows the effective "kill zone". One brand is only strong enough to pulverize with 2", the other is strong enough for 6".

Maybe Mojo is used to working with 2"..

We've set up tanks with these monster UV's. They have been remarkably clear and free from much algae. One day after a cleaning, the UV on one of these tanks got unplugged. It took 2 days for the algae to cover the glass so you could see through it. It was amazing. Now with the UV back on, back to clear water and only a light coating on the glass.
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Old 01-26-2010, 12:12 AM   #40
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http://www.viperuv.com/aquaviperuvs.htm

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