UV Sterilizer sizing?

[dieselman]

How do you know what size UV to get? I have a 75 gallon tank. Is there a rule of thumb like cut the rated capicity in half? What about flow rate, again is there a rule of thumb or just follow the directions?

Thanks!

 

[legendaryfrog]

Really, any sive UV filter can be used on your tank. The deciding factor is generally how long you have it running.

Most often, I would get a UV filter for the size of my tank and follow the instructions for flow rate. Depending on the state of the water quality and intended purpose, I would run it for a few hours every week, or up to 8 hours per day. These UV bulbs have relatively short life spans and are pretty expensive, so consider that into how long you run it.

 

[Buckdog]

Try this also:
www.drsfostersmith.com

Go to UV sterilizers and check out the article section on the right