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Discussion Starter #1 (Edited)
So this might be a silly question but, so i was at the $ store the have those rubber drawer mats, to keep things from sliding around, I was wondering if I could use that instead of screen to cover the hydro balls. It has small holes for drainage, but need others advice. Thx

*or mesh netting?
 

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not sure if it would rot or leach toxins into substrate best to stick with fiberglass mesh (window screen). its tried and true, only about $4 for a roll at home depot
 

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Those rolls should be inert but the holes might let the substrate fall though over time. I also recommend the screen.
 
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