Qanvee QS-100A & QS-200A Recommendation:
QS-100A: 1 x 100ml Pack
QS-200A: 2x 100ml Pack
Hollow Ball Filter Media is suitable for almost every type of filtration system. The average size is 1cm perbead, perfect for small filtration e.g. hang-on filter, internal filter, etc. It is pH and GH neutral.
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