Yup, I do have one 10 litre too. Routine includes changing of water every week.
I try to keep a max of 3 to 4 fishes only.....
Having nanos first will let u learn the basic the hard and painful way.....
IMO, it will kills all living organism floating in the water.
i believe that UV only kills suspended Ich bacteria in the water and not those that is already on the fish....
am i right?
hehe...