Sponge Replacement

Discussion in 'Filters and Filtration' started by phamh, Jul 24, 2015.

  1. p

    phamh New Member Member

    Hi guys. I've learnt that you should change your biochemical sponge frequently and my question is why? Yes, I know how recycling works: NH₃ -> NO₂ -> NO₃. And I also know that the filter is there to cultivate the beneficial bacteria - Nitrosomonas, Nitrosospira, and Nitrospira. I just need to know why we should change the foam once a month (this, of course depends on the fish-gallons ratio). Are those biochemical foams coated with a layer of germs that die out over time or something? I really hope someone would explain this to me. Thank you.
     
  2. KarenLM

    KarenLM Well Known Member Member

    Welcome to the forum! We're glad you joined us.

    I have not heard of changing the foam, in fact I have heard the opposite - don't change it. If it gets dirty just swish it in some tank water in a bucket during your WC. I clean mine quite vigorously with my hands once in a while. As long as it is wet or in water the BB will remain viable.
     
  3. Coradee

    Coradee Moderator Moderator Member

    Welcome to Fishlore :)
    If you change your media every month you're losing your beneficial bacteria, sponges only need changing when they're falling to bits & that can take many years.
    The only thing that needs changing every 3-4 weeks is activated carbon if you use it as it loses its effectiveness after that time.
     
  4. OP
    OP
    p

    phamh New Member Member

    Hi guys. Many thanks for your welcome and your quick replies. I swear I've read it somewhere that you should change the foam every 4 to 6 weeks, which really surprises me since it makes no sens at all. Thank you for clearing that up. Just because of that I've ordered 10 sq ft of foam on ebay :'(. I really have no idea what to do with them now.
     




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