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Extraction Fan & Carbon Filter Ducting Kit Odour Hydroponics Grow Tents Smell

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How clean do Flood and drain clay pebbles need to be?

How clean do the expanded clay pebbles have to be in a flood and drain system? This is my first time using them and I keep rinsing but the water is still a bit cloudy, it's no where near as dark as it was, I can see through it but still a bit cloudy. Any info on what problems this might cause if any?

Thank you.


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