I wouldn't choose a UV based on what the manufacturer recommends as it's not necessarily rating for dinos. For ostreoposis, it seems the UV should be 1 watt for every 2-3 gallons. This can be accomplished with a lot of the more reputable brands or cheaply with something like the 60w jebaos. Undersizing your UV seems not to work well for eradication.
+1 on this.
The Jebaos get some really bad reviews here and on Amazon. Bad seals and a liner that decays/dissolves. Some of that may be user error -- like forgetting to turn the lamp off before shutting the pump -- but read them for yourself.



