How can I build a 4'x4' ebb and flow??

ilikecheetoes said:

they are cheap and lightwieght and i dont like wood in my rooms.

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Myles117 said:

why is that? as long as you arent getting it wet theres no issue at all. i love how sturdy my 2x4 frame with plywood top sheet it.

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zem said:

you can read my brief tutorial of how I build my trays https://www.rollitup.org/do-yourself/399376-diy-switchable-grow-tray-flood.html.

i have built many such trays, i currently am running a crazy greenhouse operation, using pond liner and thick CARTON! yes just carton sheets standing on cement bricks and a rail of galvanized metal for the bottom floor to sit on and lined them with pond liner inside. i am however growing some tomatoes in them, and they are huge the system is great. btw i shaped the carton sheet like a canal 8"x8" wxh, each row is 8 ft long. and i used duct tape to hold the upper sides of the canal. i don't suggest that you build such a carton system for your MJ hydro but to give you an idea of how cheap it can get and still give the same or better results. about the use of dog food can for netting debris from res, first question that pops in my mind is if that tin can would disintegrate from ferts and acids and how good their chemicals would be. I would never use mortar trays or whatever except if I actually determine what they are made from exactly and if that is certified for use with agricultural chemicals. on a commercial scale, it will raise these questions from food controllers, but on a personal scale, it raises these questions for my personal well being. I actually went to a PVC pipes factory once and found out that his and many other PVC pipes have lead (Pb) in them, because they are intended for drains, and not for planting or anything edible. it's usually the right way which ends up cheaper

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cleverpiggy said:

Here is a good video.... https://www.youtube.com/watch?v=6eOQOm5k_dE

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