100% brand new and high quality
Features:
- Suitable for freshwater and saltwater aquariums.
- Easily detached bio-membrane improves metabolism of beneficial bacteria.
- Recyclable for plant soil use.
- Decrease the frequency of fish tank water changing.
- Fired by high temperature so as to encourage the growth of nitrifying bacteria.
- Anti corrosion and provide water of the premium quality for your fish tank.
Each block measures 6.1″ long, 1.6″ diameter,
approx 90 -100 grams. crack into pieces to any size needed,
great for used in freshwater aquariums, planted aquariums, sumps and ponds.
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