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Hey guys,

I'm new to the whole sump mechanism and I'm trying it out on a 125g. Everything has been good so far but I noticed the white hair strands on the blue balls in the sump. I am unsure of what they are, they look like they are growing between them.

I would really appreciate any help you can give me.
 

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We have some members who are sump experts, especially with freshwater tanks. I'm sure they'll be by with thier wealth of knowledge to get things sorted for you. One of them may even be writing an article on freshwater sumps, so be on the look out ;-)
 

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Most likely biological. Keep in mind that bioballs are probably the most efficient method of aerobic biofiltration available to the common hobbyist, so bacteria will grow much more rapidly than in let's say a canister filter. Bacteria will create a biofilm to help trap nutrients, which I've seen in many shapes and forms (I've had 2" PVC clog on me with what I can only describe as bacterial snot lol). Just based on my research in biological water treatment, that certainly looks like biofilm it to me.
 

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We have some members who are sump experts, especially with freshwater tanks. I'm sure they'll be by with thier wealth of knowledge to get things sorted for you. One of them may even be writing an article on freshwater sumps, so be on the look out ;-)
and just when i thought a inside joke could be between people you see everyday. im thinking maybe some type of cyano seeing how bioballs can get a buildup on them?
 
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