Speck Koi Filter Gravel Coarse 40Kg

Description

The 4-9 mm Koi Gravel Filter Medium is excellent for use in ponds and gravel filters where larger particle size is preferred for improved water flow and reduced clogging. Its 4-9 mm gravel offers a sturdy support layer beneath finer media or can be used alone for gravel filtration. Supplied in a 40 kg bag, this washed and inert material is safe for koi and other aquatic life, allowing for biological filtration while maintaining clarity.