Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater Reef Aquaria
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 01-13-2004, 03:25 PM   #1
Aquarium Advice Apprentice
 
Join Date: Sep 2003
Location: Florida
Posts: 44
Should I buy a used UV

How can I tell if it is working properly?
__________________

__________________
There is a thin line between a hobby and mental illness.
edison9114 is offline   Reply With Quote
Old 01-13-2004, 03:33 PM   #2
AA Team Emeritus
 
Join Date: May 2002
Location: Virginia
Posts: 2,256
Send a message via ICQ to fishfreek Send a message via AIM to fishfreek Send a message via MSN to fishfreek Send a message via Yahoo to fishfreek
Most UV units will have a small peep hole where you can see the if the UV bulb is lighting up. You sont want to look directly at the UV bulb with it out of the unit.

If its used then you should look at buying a new UV bulb since they need replacing just like regular florecent bulbs on a regular schedule.
__________________

__________________
Remember dont tap the glass, your fish will think you're an idiot -Anonymous mother

Check out our articles area. 30+ Aquatic articles for your enjoyment
Are you in or around the Shenandoah Valley area? If so click here to join our regional forum.
fishfreek is offline   Reply With Quote
Old 01-16-2004, 03:55 PM   #3
Aquarium Advice Activist
 
Join Date: Sep 2003
Location: Ft. Lauderdale, Fl
Posts: 168
i second the ffishreek's advice, buy a new bulb, it's your best bet.
__________________
125gal. megaflow. Fish Residents:
Yellow Tang -(Junior), Flame Angel -(Flamey)
Bicolor Blenny -(Butch), Randall Jawfish -(Jaws)
Lawnmower Blenny -(Lenny), Talbot's Damsel -(Dottie), Tomato Clown -(Ketchup)
Nameless fish include, Neon Blenny, Singapore Shrimp Goby, Yellow Tail Damsel, 1 Skunk Cleaner Shrimps, purple pseudochromis.
gfishguy56 is offline   Reply With Quote
Old 01-16-2004, 05:40 PM   #4
Aquarium Advice Freak
 
Join Date: Jan 2004
Location: Bedford Hills, NY
Posts: 251
Hi Edison,

As indicated earlier - a new bulb is a must. Even if your source says it's new, it would be nearly impossible for you to determine if it is still generating the necessary power in the correct wavelengths to have a suffecient "killrate" for micro-organisms (unless you had a considerable amount of light analysis equiment including a very sophisticated digital spectrometer). Their typical effectivity is a year.

So, as mentioned by gfishguy and fishfreek, - you have to buy a bulb. That being the case consider the following example: a 25 watt Rainbow sells for about $150, the bulb sells for about $50. Therefore if you were to buy this unit used for $90 and then bought the bulb new for $50 your total cost would be $140. Thereby only saving 10 bucks and ending up with an old UV unit and no warranty or support.

Also be careful about one other thing here - the sleeves that the bulbs fit into are of critical importance to the effective transmission of UV to the passing water. Many of these are Quartz based. Over time the UV alters the property of the quartz sleeve and it has to be replaced as well. Manufactures differ on the life span of this sleeve but needless to say if the unit is very old this may require replacing as well (for a 25watt unit these can run about $50 as well). Even if the sleeve is not quartz - its clarity likely suffers in some environments (i.e. carbonate deposits etc.) so this is something to consider,

Bottom line: I think it's better to buy new unless you are sure of your source - the type of unit, how long it's been in use, etc.

Also - recall that the "kill rate" of these devices is directly related to flow rate through them, i.e. the dwell rate of water inside the unit. Be sure you consider this in your choice.

Hey hope this helps.

Tom
__________________
"Not everything that can be counted counts, and not everything that counts can be counted."
- Albert Einstein (1879-1955)
TheMadNucleus is offline   Reply With Quote
Reply

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
To buy or not to buy (canister filter) Kim Kipper Freshwater & Brackish - General Discussion 3 09-11-2005 04:06 PM
Questions on where to buy sand and what to buy. jasno999 Freshwater & Brackish - Getting Started 6 04-21-2004 05:03 PM







» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 12:52 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.