Aquaone Cf1000

[hedgehog]

OK, another question, my filter (an Aquaone CF1000) came with various media. The sponge's and ceramic chips I understand, but what are the black sphere like objects with holes in that are sitting in the very bottom of the filter

Oh, and whilst I'm asking about media, is it worht adding peat? I live in a hard water / alkaline area and, (if my research is correct) believe that adding peat can reduce the pH?

Thanks!

 

[wendywc]

Bioballs! Those are great.

Also, what pH do you have now? I've only heard of using peat for a discus tank. Never used it personally.