Bông bọt biển lọc nước hồ cá màu đen

Description: BRAND NEW and HIGH QUALITY! --Thickened tough and durable sponge --Suitable for fresh water and sea water --Reduce algae breeding and fish death --Cultivate high density nitrifying bacteria --Size can be cut freely as your need Item type: Filter biochemical sponge Applicable: Sea water tank, fresh water tank and aqua-plant tank Color: Black Size: 50x12x2cm, 100x12x2cm, 50x50x2cm Weight: 25g, 50g, 110g Material: Biochemical cotton Package includes: 1 * Sponge Note: 1-2cm error might exist due to manual measurements (note: 1cm=0.39inch), please kindly understand. Please contact us first when you have any problem, and we will give you the best service and solve the problem ASAP. Thank you so much.