水草情迷

Black pearl, where should be placed on the filter tank (ATMAN, 2 layers)? below or behind the cotton?
And how long for replacement?
I have used a 24" tank, about 80-100 L.
One pack of (1L) packing whether should be seperated in 2 or 3 time for using ?

Thanks a lot again for everyboby.

Regards,

Heven.

放係底個格, 最面多數都係最密o既, 即係白綿.
幾耐先換, 係冇一定o既, 飼養密度, 餵食, 品種都會影響濾材更換.
有人一個月會洗桶換濾材, 有人成年都可以唔理

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