UV Sterilizer Dwell Time Experiment, Effect on UV-C Sterilization• Test Between Compact UV and Straight Tube UV
• Comparison of UVC Dwell Time Between T5 & T8 UV Bulb
• UV Sterilization and Dwell Time Comparison PDF
Search AAP Supplies or Information
What does this mean?
The Terminator is a very good compact UV (among the best from our maintenance companies experiences, comparing favorably to the Tetra and better than the Jebo, Aqua Top, Coralife Turbo Twist and others), HOWEVER when you consider the 8 watt Vecton actually has a higher dwell time due to actual time per ounce of water held close to the UVC lamp and although the 13 Watt Terminator has a higher energy output, the lower dwell time basically renders these two UVs equal in aquarium/pond gph capacity.
Better yet in the case of the super high efficiency Pro Clear UV55, this same test yielded 2.29 watts of UVC Energy per second with an "apples to apples" adjusted flow rate of 750 gph (8.17 watt per second with the same Rio 200 pump).
Product Resource: TMC Pro Clear UV55: High Efficiency Pond/Aquarium UV Sterilizer
The bottom line is a Premium High Dwell Time UV with almost 100% water exposure to UVC irradiation under 3 cm that is of less wattage is going to out perform a well designed Compact UV of higher wattage (many compact UVs are not of the design either of the Terminator)!
In the previous test, the Vecton 8 Watt utilizes a T5 UV Bulb, but what about the common T8 UV Bulbs used in many larger UV Sterilizers versus a T5 of similar size?
While T5 lamps are roughly 16% more efficient at converting electrical energy into light energy, this does not necessarily make the T5 the better lamp as some have stated.
Also, if the manufacturer uses a 5/8" diameter T5 instead of a 1" diameter T8, and reduces the tube sleeve diameter by 3/8" (compared to a T8 fixture), and then reduces the reaction chamber diameter by 3/8" (to stay within 3cm of the tube sleeve); in that case, the T5 fixture will have a smaller cross section area, which will REDUCE the dwell time for any given volume flow rate.
Reference: Everything Aquatic Forum: UV Sterilization
As an example, a 57 watt T5 as used in the Aqua 114 watt UV is 17.5 inches long (two lamps are used), while the 55 watt T8 UV bulb used in the TMC 110 is 36 inches long (two lamps are used).
Product Resource: TMC 110 Watt Professional Large Pond/Aquarium UV Sterilizer
This might not be the case in every T5 to T8 comparison, but in many comparisons the slightly lower efficiency is trumped by the longer dwell time, so we cannot necessarily make the case for T5 being the better UV bulb.
FOR MORE, PLEASE READ THIS COMPLETE ARTICLE ABOUT THE USE OF UV-C STERILIZATION IN AQUARIUMS OR PONDS:
Back To Top
RELATED PRODUCTS & INFORMATION:
Back To Top
If you have found this site helpful (or the sister site Aquarium and Pond Answers), please consider a donation to help with the 100s of hours of research and regular updates that go into these articles:
| Weekly-Newsletter | Basic_Aquarium_Principles | Basic_Saltwater | Aquarium_Disease | Aquarium_Lighting | Goldfish_disease | Aquarium_cleaning | Nitrogen_Cycle | Redox_Potential | Clear-Pond | Aquarium_Filtration | Aquarium_Medication | Aquarium UV Sterilization | Vibrio_Aeromonas | Aquarium_Ich | Columnaris | Aquarium-KH | sponge_filtration | Aquarium-Plants | Quality_Fish_Food | Oodinium |
| Return Home | Aquarium_Information | Aquarium Products | Downloads | FAQ | Contact Us | View Cart | Other |