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mtome
11/19/2008, 06:58 PM
Would a 57 watt uv be an overkill on a 80 gallon system? I just downsized from a 300 gallon to a 80 gallon system. That is the only sterilizer I have right now. Thanks

jdg
11/19/2008, 07:04 PM
What's the planned flow rate through it?

mtome
11/19/2008, 07:36 PM
It will be connected to my closed loop pump which is rated 900 gph.

jdg
11/20/2008, 07:09 AM
<a href=showthread.php?s=&postid=13780601#post13780601 target=_blank>Originally posted</a> by mtome
It will be connected to my closed loop pump which is rated 900 gph.

900gph on a 57W UV might take care of algae/green water ... but that's it. I'm assuming this is a NO57W?

If you wanted to do protozoa at that flow rate, you'd need something rated for like 1000g.

If you put it on a bypass and reduce the flow to it, might be better. An 80g system can be turned over 20x at 1600gpd ... flow rate for protozoa on that lamp would be around 200 gph (as a guess -- a 40W is 157gph and a 65W is 285gph) -- and that's after a year or so of usage.

The problem with running 900gph of flow through it is you're not going to allow enough contact time for the UV to do anything beneficial.