Originally Posted by danbstrong
What are the disadvantages¿
Well there are more than you think and it also depends on how good your UV
is and how slow you are running water through it.
First disadvantage is cost, as good units usually are not that cheap plus the cost of power and replacement bulbs every 6 months.
Second is maintenance. Its one more thing to maintain and if you dont have a unit with a built in wiper the job can be even more time consuming, to operate efficiently it needs to stay clean.
Thirds is it is indiscriminate. It will reduce populations of anything passing through it and if running slow enough they will kill organisms from free floating algaes to microfuana. This includes the somewhat sought after coralline algaes.
Also they are not actually capable of sterilizing your entire water column. In order for this to occur you would need an oversized UV
running water through it at a fast pace. Nothing forces all these organisms to pass through the UV
hence why the can not completely rid of ich and other such parasites.
Yes they will make your water slightly clearer but a carbon reactor can usually put out similar results. With more advantages and less draw backs.
Dont get me wrong UV
's have there use, better suited for FOWLR
's and fish only.