Just a quick thought I had this morning whilst waiting for the milk vampire to awaken. Is it better to over do the UV on you pond the same as your filter i.e. a 4000G lamp on a 3000G pond?
Cheers
UV light
Re: UV light
Think it really depends on how much sun light your pond gets. Mine gets a lot during the day and believe it or not I've got 110 watts on 4000 gallons. Bit over kill but never mind.
Ian
Ian