#hob

  1. P

    HOB Filter on 40 Gallon Reef

    Hello! I am considering buying a 40b tank for saltwater and I’m thinking of experimenting and using a HOB filter. Now I know a HOB filter will NEVER be as good as a good old sump but I believe it can come somewhat close. I would put in some chemi pure blue, a poly filter pad, and possibly some...
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