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Old 06/05/2018, 08:43 AM   #1
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Manicosi's Avatar
Join Date: Mar 2007
Posts: 70
Apex programming for UV Sterilizer

I am hoping that someone might be able to assist with a program code for my apex that would control my EA 80W UV sterilizer. I want to run the UV sterilizer and dedicated pump from 9 pm to 9 am only and turn off the UV and pump if the temp rises above 80 degrees. I also would like the pump to power on a minute before the UV is turned on as well as stay on a minute after the UV is turned off. Any help that can be provided would be much appreciated. Please feel free to include any other suggestions/opinions for programming a UV. Thanks

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Old 06/05/2018, 06:39 PM   #2
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Join Date: Jun 2010
Location: Tampa
Posts: 653
For the pump:
Fallback OFF
If Time 20:59 to 21:00 Then ON
If UV_Light ON then ON
Defer 000:060 Then OFF

For the UV_Light
Fallback OFF
If Time 21:00 to 09:00 Then ON
If Temp > 80 Then OFF


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Current Tank Info: 190
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Old 06/11/2018, 10:52 AM   #3
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Posts: 70
Thank you

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Old 06/17/2018, 09:33 PM   #4
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Join Date: Sep 2009
Location: Simi Valley, Ca
Posts: 13,794
If you want your UV bulbs and ballasts to last, you should run it 24/7. UVís are not designed to be turned off regularly and shutting them of daily will drastically reduce the life of the bulbs (upwards of 50% or more) and cause premature failure of the ballasts.

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Current Tank Info: 480G display mixed reef, 90G sump, 90G refugium, 60G display refugium. Check out my build thread:
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Old 06/18/2018, 05:32 AM   #5
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Join Date: Apr 2006
Location: Stamford, CT
Posts: 17,423
One thing I have found useful is to delay the on for my UV after a power loss. Mine requires the ballast to cool before it will properly restart.


Got back into the hobby ..... planned to keep it simple ..... yeah, right ..... clearly I need a new plan! Pet peeve: anemones host clowns; clowns do not host anemones!

Current Tank Info: 450 Reef; 120 refugium; 60 Frag Tank, 30 Introduction tank; multiple QTs
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