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09-20-2004, 03:18 PM
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#16
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Reefless Reefer
Join Date: Jun 2002
Location: Durham, NC
Posts: 20,559
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there is a certain amount of time that the water needs to be exposed to the UV rays in order for it to kill things. the time is much shorter for algae than it is for parasites. i want to think that it is in the neighbor hood of 5 secounds. this 5 secounds is what i was asking about. it takes a long tube to get 5 secounds of dwell time.
i will see if i can hunt down the correct length of time to kill parasites.
Spanky is refering to the amount of water that the UV should process.
G~
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09-20-2004, 03:42 PM
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#17
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Automotive Paint Nerd
Join Date: Oct 2002
Location: Livonia, MI
Posts: 603
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If its a quartz envelope, it's totally UV transparent.
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09-20-2004, 07:50 PM
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#18
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Sodomy non sapiens
Join Date: Dec 2003
Location: winder, Georgia USA
Posts: 714
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Even if the sleeve it is UV transparent you will still have losses from refraction/reflection, also I don't think bulb breakage is a big issue. Bulbs break when they are really hot then splashed with cold water; as a matter of fact the earliest tank heaters where incandescent bulbs immersed in the water.  I have also recently sceen florescent tubes that you can mount under water to backlight your rocks.
An ideal I have wondered about is using bare metal halide tubes. You could have the unshielded bulb burning over water flowing down a thin slanted trough that is mounted over the display tank. You’d have to be real careful not to have a splash but you would have a high-powered uv.
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"Reasonable men adapt themselves to their environment; unreasonable men try to adapt their environment to themselves. Thus all progress is the result of the efforts of unreasonable men." -- George Bernard Shaw my tank
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10-04-2004, 01:05 AM
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#19
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Klingon
Join Date: Feb 2002
Location: Forest Grove, OR
Posts: 1,808
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Ordered a bulb from
http://www.bulbman.com/index.asp?Pag...OD&ProdID=3977
The other site that had a bulb for may have been a typo on the bulb, said the colortemp was 2700k. Anyway this bulb was $17, came to $25 with shipping.
Here's the chamber almost ready to receive the bulb.
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40g 3' BB tank * 2 Seio 820's * 250w 14kk light * 190w actinic/10kk * DIY recirc skimmer.
~If I could only remember half of what I've learned~
~Jimbo~
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10-07-2004, 01:17 AM
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#20
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Klingon
Join Date: Feb 2002
Location: Forest Grove, OR
Posts: 1,808
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Wooo Hooo
Have it hooked up today, cut a hole in the top of the pipe and siliconed in the uv bulb and cap. Still need to silicon over the wires to the bulb, was checking for leaks and there where none so went ahead and fired up the bulb.
I purchased a 1.99 spiral light and removed the ballast to run the uv bulb. Total cost was about $30. Of course I had most of the plumbing stuff, tap and bit for the in/outlets and silicon on hand.
Now see if spanky is right about uv. I've been keeping an eye on the tank, some uv bulbs put off ozone. Plumbed it before the skimmer. as you can see from the picture it is just hanging on the side of the tank for now. 
__________________
40g 3' BB tank * 2 Seio 820's * 250w 14kk light * 190w actinic/10kk * DIY recirc skimmer.
~If I could only remember half of what I've learned~
~Jimbo~
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10-07-2004, 01:45 AM
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#21
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Klingon
Join Date: Feb 2002
Location: Forest Grove, OR
Posts: 1,808
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More pics, peep hole and uv bulb side
__________________
40g 3' BB tank * 2 Seio 820's * 250w 14kk light * 190w actinic/10kk * DIY recirc skimmer.
~If I could only remember half of what I've learned~
~Jimbo~
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10-07-2004, 06:55 AM
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#22
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Automotive Paint Nerd
Join Date: Oct 2002
Location: Livonia, MI
Posts: 603
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UV below 240nm creates ozone. This looks pretty cool, I wish I had the ability to build things like this.
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10-07-2004, 08:04 AM
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#23
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Little Fishy
Join Date: Jul 2004
Location: Buford, GA
Posts: 362
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be sure to keep us updated!
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10-07-2004, 09:36 AM
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#24
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Reefless Reefer
Join Date: Jun 2002
Location: Durham, NC
Posts: 20,559
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how long do you think the water stays in the sterilizer?
G~
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10-07-2004, 10:24 AM
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#25
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Klingon
Join Date: Feb 2002
Location: Forest Grove, OR
Posts: 1,808
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Quote:
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how long do you think the water stays in the sterilizer?
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Around 4 or 5 seconds. But remember the water comes into direct contact with the bulb so it's probally getting a good zap of UV. I will clean the glass today and see how long it takes to get a film on it. usually about 3-5 days.
This morning everything in the tank looks just like it usually looks. So I don't think ozone is an issue.
__________________
40g 3' BB tank * 2 Seio 820's * 250w 14kk light * 190w actinic/10kk * DIY recirc skimmer.
~If I could only remember half of what I've learned~
~Jimbo~
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10-07-2004, 11:25 AM
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#26
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Reefless Reefer
Join Date: Jun 2002
Location: Durham, NC
Posts: 20,559
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sounds good, curious to see how long the bulb lasts. i have always been afraid of the tube breaking in the water. that is why i have not tried to make one. i am a wimp when it comes to electricity and water.
G~
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10-07-2004, 06:41 PM
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#27
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Little Fishy
Join Date: Sep 2004
Location: North Carolina
Posts: 335
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i have a FW %% and my Flower Horn Head-Butted my heater and it broke in half. The problem was the heater had foam in the bottem so it floted in place for a while. My fish ended up being shocked by a 150w heater for about 3 days i recon. Poor guy. I found out when i was cleaning and got a good shock. He is amazingly alive still and this was around a month ago but he is very streesed/depressed. He doesnt swim at all any more and hardly eats. I feel really bad for him.
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10-07-2004, 06:41 PM
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#28
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Little Fishy
Join Date: Sep 2004
Location: North Carolina
Posts: 335
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**55g tank
dont you just hate it when you want to capitalize your numbers too.
lol
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10-07-2004, 10:54 PM
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#29
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Reefless Reefer
Join Date: Jun 2002
Location: Durham, NC
Posts: 20,559
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Quote:
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Originally Posted by darthteddy
**55g tank
dont you just hate it when you want to capitalize your numbers too.
lol
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G~
__________________
Think Tanker
Friends Don't Let Friends Use Refugiums!
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My Build Thread
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10-09-2004, 03:58 PM
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#30
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Klingon
Join Date: Feb 2002
Location: Forest Grove, OR
Posts: 1,808
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It's been a couple of days and the biggest change is in the skimmer. It now removes much larger particles, due to increased stickyness of the foam. This should equate to better water quality.
It did take a couple of days of the UV turned on before I started to see the increased skimmer output.
__________________
40g 3' BB tank * 2 Seio 820's * 250w 14kk light * 190w actinic/10kk * DIY recirc skimmer.
~If I could only remember half of what I've learned~
~Jimbo~
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