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Thought about that since my runoff pump can get particles in it, but I have a filter after my feeding pump and before the lines My real concerns are calcium due to the coco, and pH stability. But I feel like if I start with the recirculating after a couple of weeks I should be good to go I think once the coco has all the calcium it can handle it's just replacing itself with each fertigation
Would you drain/refresh weekly or couple weeks or are you talking about recirculating the whole grow?