36-40 watt U.V. Sterilizer

[Old Man Of The Sea]

Here we have the next topic for the rebuilding of my 240 gal reef tank, something that came up when i ask my aquarium man on what other equipment should I be looking for, and the equipment part he mention is a U.V. Sterilizer. Now the tank is 240 gals and the sump will be a 125 gals, im thinking I want to be looking for is a 36-40 watt U.V. Sterilizer, is my assumption correct? And which is the best to have?
　
40W Classic UV Sterilizer 3/4" NPT w/o Wiper (Aqua UV)
http://www.aquariumguys.com/ultraviolet3.html
　
40W Classic UV Sterilizer 3/4" NPT w/Wiper (Aqua UV)
http://www.aquariumguys.com/ultraviolet7.html
　
40W Classic UV Steril. 2" Port w/Wiper (Aqua UV)
http://www.aquariumguys.com/40wclassicuv1.html
　
　
http://www.aquariumguys.com/uvsterilizers.html
http://www.saltysupply.com/Aqua-Ultr...zers-s/620.htm
http://www.thatpetplace.com/pet/cat/...5/category.web
http://www.aquacave.com/UVSterilizers.aspx
http://www.fishtanksdirect.com/uv-sterilizer.aspx
http://www.wetdryfilter.com/uv_sterilizers.htm
http://www.marinedepot.com/uv_ultrav...qua_uv-ap.html
http://www.aquarium-supply.biz/UV_St...Line_s/430.htm
http://www.aquarium-supply.biz/UV_St...anks_s/434.htm
http://www.vascaaquariumsupply.com/U...anks_s/434.htm
　
　
I taking notice of one thing different with the models here, some are with wiper and without it. What is the difference between the two?

Who can even suggest other U.V. Sterilizers, your suggestion be most welcome
　
This part is nothing to do with this topic, its about the overflow and bulkhead that if it should be impossible to be made larger, then I would need to look into another return pump, or two return pumps as James was first suggesting about, only I not want the quiet one or the eheim pumps.

Buddy

[chrisd]

first off the uv is not a must have. and it will depend on what you want it to do. i assume you have 365 gal. of total water volume. the 40 watt uv will work but i think you would need the 57 watt.

the one with the wiper is to help keep the glass tube the light is housed in clean. it makes it alot easier then having to take it apart. the aqua uv's are very good i used them on my ponds. the only reason i used it was for water clarity but they can be used to help control harmful bacteria.