Does anybody use UV to dechlor their tap water?

[MrMuggles]

I think this is a good idea generally but I’m not sure about it. Pros/cons, have you tried it?

 

[A201]

I believe a lot of fishkeepers let buckets of tap water gas out in direct sunlight. Speaking from someone who maintains a swimming pool, direct sunlight dissipates Chlorine very quickly. Sunlight dissipates Chloramine too, but I'm not sure if the process is quite as fast.

 

[AvalancheDave]

I lost a bunch of fish to chloramine years ago. I didn't know it would zip right through RO membranes. I had UV running on all my tanks so I guess it didn't dechlorinate effectively enough.

Using chemicals is much cheaper and much more effective.

 

[Arvil]

The half-life of hypochlorite in water in the sun is about 20-30 minutes, that’s why pool people use cyanuric acid to hold chlorine levels. Chloramines are about 25 days, shorter in the sun, but I don’t know how much.