You've got a point I suppose, but the water does have a reducing effect on the amount of UV that penetrates the water, but then again I suppose it is huge amounts of UV light.with UV bashing down on the surface of the ocean all day what are we talking about? UV is introduced to the oceans water everyday but we are reluctant to do it? In your tank you are trying to simmulate the natural enviroment to get the best results, so what is wrong with introducing UV to your system if that is what is happening in nature.
No, because I think it is a crap shoot as to what you pick up in the water during the collection. If you pick up a plantonic organism that "blooms" under tank conditions the subsequent depletion of oxygen in the water can wipe out your tank. For me the possible beneficial plankton that I may collect as food for the thank is far outweighed by the risk of a bacteria / plankton bloom. I totally nuke the water to ensure as close to sterile as possible.is this because you store NSW Neil?coz in my case i do my water change in about 1-2 hours after collecting,so no/minimal plankton die off
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