Dirtbag said:

I would only reuse wastewater from rockwool and even then it has to be filtered and UV treated before being fed back to the plants. Doable, I actually do it myself, but again I only do it with wool and UV.

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Cashmeh said:

So im curious to as if someone has ever put a uv light in their res, under the root structure lol. Wouldnt it stop root rot that light would normally cause? Retention time right? lol. . im assuming someone has done this. Just curious as to how it would work on sterile systems with chillers. I just find it wild how one spectrum can cause fungi growth, and one can eliminate it? Am I just confused?

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Rickcin said:

I usually toss the runoff water when watering my girls and it just dawned on me that perhaps I could mix this with the already nutrient mixed water to water the girls the next day instead of tossing it? Thanks

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