Worst Month Yet.

[sphelps]

You'll want a large inline UV sterilizer, avoid submersible ones or smaller units that promise they work as well as larger ones. Also you'll want to be careful of some of the ratings UV sterilizers come with as there are two types, one for clarification and one for sterilization. Typically a UV sterilizer that can clarify 1000 gallons is only good for sterilizing 200 gallons, very few units actually present both ratings. A good brand to go with is lifeguard, the 40W unit would be a good choice and remember it can't really be too large. For a cheaper alternative look at some pond units, they usually cost a little less and do the same thing.

UV sterilizers don't really have a down side IMO other than the extra cost and maintenance, they won't effect your bacteria population and won't really have an impact on other beneficial organisms either but if you're overly concerned about pods and whatnot run the UV during daylight hours only since the free swimming organisms are more active at night.