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need some help if you have a cycled freshwater tank can you use a uv sterilizer


john1959
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49 minutes ago, john1959 said:

if you have a cycled freshwater tank can you use a uv sterilizer will it kill the good bacteria ? 

The BB(beneficial bacteria) live in the filter, substrate and on every surface inside your aquarium rather than in the water. Using a uv sterilizer will not harm you cycle in any way. 

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