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Is UV light a necessity in the sump?


lvcap
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He is refering to UV light to sterilise the water i believe...

if that is the case, UV light is useful when the tank has an ich outbreak...but it only kill the ich freefloating in the water, but at least it contains ich to a certain extent and give the fishes a chance to fight the ich....

under normal circumstances, UV light actually disrupts the natural cycle of the reef whereby many organisms are dependent on the free floating plankton or phytoplankton or watever teeny weeny stuff in the water, the UV will just kill all the good stuff and the bad stuff...

if sterilization is the key issue here, UV is less effective than ozone.. I am a supporter for ozone sterilization..but then again...more complicated issues like ORP/redox levels are involved

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