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Pure Coco Chips Compressed 4kg block Quantity:Pack of 4 blocks flat surface pH probes typically flat surface pH probes typically used in chemical plants for process control 77) solution is used as a reference or checking solution to ensure you have adequately cleaned the EC CF probe Loose coco chips or croutons or husks packed compressed in blocks approximately 8 9 lbs in weight Direct as a soil less grow medium
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