Cheapest hydroponic system?

yeah it would work just paint the rez black duck tape or paint the top so no light gets in and get some nutes. i made a little homemade one. its a 2 site hydro. worked out great.
 

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you plant your seeds in rockwool or clones. You put clay rocks into the pot as a pot medium this will help to make sure the plant stays there


Question. Would a dark blue laytex paint work?
 
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