bio balls

[mysilverdragon]

do you need to fill bio balls with media ??

 

[E.C.]

What do you mean to fill with media? Bio balls are a form of 'media' my friend. they're the media (Bio ball) that you have to put in a sump or any mechanical filtration if you chose to...

 

[mysilverdragon]

i have seen some that open so you could maybe but floss in them??

 

[Ian21777]

I have some with a foam core

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