UV Sterilizer bulb usage

Ecotech Marine

justahobbyright

Active Member
View Badges
Joined
Jan 21, 2021
Messages
208
Reaction score
109
Review score
+0 /0 /-0
Location
East Coast
I have been running a 57 watt Aqua UV for years. I religiously replace the bulb once a year.

This past year using my Apex I have run the sterilizer only 12 hours a day. Does this allow me to skip replacing the bulb this year?

Thx.
 
Top Shelf Aquatics

zalick

A cup of water and a dash of salt
View Badges
Joined
May 29, 2014
Messages
1,557
Reaction score
1,790
Review score
+0 /0 /-0
Location
Portland
I have been running a 57 watt Aqua UV for years. I religiously replace the bulb once a year.

This past year using my Apex I have run the sterilizer only 12 hours a day. Does this allow me to skip replacing the bulb this year?

Thx.
I believe so. Per aquauv the lifespan is 14 months when run 24/7.

Also remember to Inspect and clean the quartz sleeve often.
 

zalick

A cup of water and a dash of salt
View Badges
Joined
May 29, 2014
Messages
1,557
Reaction score
1,790
Review score
+0 /0 /-0
Location
Portland
Logically it would seem like it would last twice as long, but does the extra on/off reduce the life of the bulb at all. I don't know. Only reason I mention this is that my last one blew when I turned it on and it was only 8 months old.
Good point.

I'm going to message aquauv now and ask. They have great CS.
 

addictreef

Valuable Member
View Badges
Joined
Feb 27, 2017
Messages
1,419
Reaction score
1,242
Review score
+0 /0 /-0
I believe so. Per aquauv the lifespan is 14 months when run 24/7.

Also remember to Inspect and clean the quartz sleeve often.
Yes I always clean the quartz sleeve every 6 months. Very important not to forget, there is always build up.
 
Reef Chasers Aquaculture
OP
justahobbyright

justahobbyright

Active Member
View Badges
Joined
Jan 21, 2021
Messages
208
Reaction score
109
Review score
+0 /0 /-0
Location
East Coast
Logically it would seem like it would last twice as long, but does the extra on/off reduce the life of the bulb at all. I don't know. Only reason I mention this is that my last one blew when I turned it on and it was only 8 months old.

That is a great point typically it would have almost no on off cycles.
 
Corals.com

theMeat

Valuable Member
View Badges
Joined
Oct 1, 2017
Messages
2,352
Reaction score
1,910
Review score
+0 /0 /-0
The bulb needs to be replaced because it looses the proper wavelength over time. The bulb still lights up, but looses effectiveness at sterilizing,
The unit going on and off may slightly (very) effect the lifespan of the bulb in terms of the bulb might blow (meaning it won’t light up). Ever notice your house light bulbs more often blow out when you turn em on... quick change on temperature, materials expanding, blah blah blah.
Can’t see the transformer being effected by going on and off.
You buy and use a uv for a purpose. Depending on size, flow, what you want sterilization to accomplish, run it as you intend. Not because the bulb lasts longer or out of fear that there a small change your bulb might blow.
I usually order a few bulbs at a time anyway. If bulb blows, change it.
Cleaning the sleeve probably shortens the bulb life in terms of it blowing out more than anything. Don’t find them to get too dirty. Or for that build up to effect the effectiveness much. I only clean when o change the bulb.
 

StlSalt

Active Member
View Badges
Joined
Sep 30, 2020
Messages
479
Reaction score
617
Review score
+0 /0 /-0
Location
St. Louis, MO
Why does the wavelength change? I'd assume it was something changing or being depleted from the filament. I'm not trying to debate anything just trying to understand. I've been told to change UV bulbs out every year, but I've never looked into the science of why. Like you, I doubt the on/off cycle would reduce bulb life by much, but I don't know for sure.
 

ca1ore

10K Club member
View Badges
Joined
Oct 28, 2014
Messages
13,352
Reaction score
18,815
Review score
+0 /0 /-0
Location
Stamford, CT
There’s no ballast.
I use the terms ballast and transformer interchangeably .... not technically correct I suppose. Aqua UV uses a transformer, how that reacts to on/off cycles was my point LOL.
 

theMeat

Valuable Member
View Badges
Joined
Oct 1, 2017
Messages
2,352
Reaction score
1,910
Review score
+0 /0 /-0
I use the terms ballast and transformer interchangeably .... not technically correct I suppose. Aqua UV uses a transformer, how that reacts to on/off cycles was my point LOL.
Yeah, figured that’s what you meant. Wasn’t trying to be a know it all.
could see a ballast going bad from on/off. For a transformer much less likely ime
 

theMeat

Valuable Member
View Badges
Joined
Oct 1, 2017
Messages
2,352
Reaction score
1,910
Review score
+0 /0 /-0
Why does the wavelength change? I'd assume it was something changing or being depleted from the filament. I'm not trying to debate anything just trying to understand. I've been told to change UV bulbs out every year, but I've never looked into the science of why. Like you, I doubt the on/off cycle would reduce bulb life by much, but I don't know for sure.
Not exactly sure. Would guess it has something to do with temperature the filament reaches.,,
I know it’s not a gimmick, since I can see the difference in water when I change
 

ca1ore

10K Club member
View Badges
Joined
Oct 28, 2014
Messages
13,352
Reaction score
18,815
Review score
+0 /0 /-0
Location
Stamford, CT
Yeah, figured that’s what you meant. Wasn’t trying to be a know it all.
could see a ballast going bad from on/off. For a transformer much less likely ime
Yeah, that's probably true. I used a pondmaster UV for a while and the ballast would blow if you looked at it wrong.
 

theMeat

Valuable Member
View Badges
Joined
Oct 1, 2017
Messages
2,352
Reaction score
1,910
Review score
+0 /0 /-0
Yeah, that's probably true. I used a pondmaster UV for a while and the ballast would blow if you looked at it wrong.
Would guess they incorrectly sized the transformer, or had a bad run on em. As far as I know there’s no uv sterilizer that’s made it into aquarium market that uses a ballast.
 

theMeat

Valuable Member
View Badges
Joined
Oct 1, 2017
Messages
2,352
Reaction score
1,910
Review score
+0 /0 /-0
Dunno .... gave up on it. they call it a ballast but you're right its actually a transfomer.
Not to hijack the thread but often wondered why uv lights are not fluorescent, or are they. The reason I wonder is because with any fluorescent light the hi voltage (ballast) excite the gas, which make the light and also lotsa uv light in the process. The ballast makes hi voltage to activate the gasses while also reducing voltage since the gasses want more as they get active.
A transformer either reduces or increases voltage and that’s it. Maybe a non fluorescent bulb is more stable, in terms or wavelength? Idk but wonder, if anyone knows
 

zalick

A cup of water and a dash of salt
View Badges
Joined
May 29, 2014
Messages
1,557
Reaction score
1,790
Review score
+0 /0 /-0
Location
Portland
I have been running a 57 watt Aqua UV for years. I religiously replace the bulb once a year.

This past year using my Apex I have run the sterilizer only 12 hours a day. Does this allow me to skip replacing the bulb this year?

Thx.
FWIW -

AquaUV kinda dodged the question but said "we designed the unit to run 24/7 and that is our recommendation".

I don't really see any issues running it 12/hrs per day and your probably get 2x the life from the bulb....
 
Orphek OR3 reef aquarium LED lighting
AI Hydra

Do you quarantine new coral before adding it to your reef tank?

  • YES always

    Votes: 74 18.2%
  • Sometimes depending (tell us why)

    Votes: 49 12.1%
  • NO never

    Votes: 271 66.7%
  • Other (please explain)

    Votes: 12 3.0%
Printed Reef
Top