Good day to all.. I am just bought a used 4x2x2 tank with sump. This tank already used for freshwater previously with some biofilter too. Wanna need some advice from you guys whether should i put the tap water and bleach and run the water cycle for 1 week..? Cause i read some reefer that some of them just pour the bleach to sterilize disinfect and kill all germs inside.
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