If 25% monthly water changes keeps the nitrates in check... then we can hardly call such proper maintenance lazy...
It may be true that additional benefit could come from doing say a 15% water change every other week... or 10% weekly... but if 25% monthly keeps things in check then it can hardly be called "lazy"
You probably said it with a smile on your face and with the best of intensions... but such friendly tones are sometimes lost on the internet...
The JBJ submersible UV is the one I was talking about

I did goof up though, they are available in 5 or 7 W... I was thinking it was 7 or 9W...