Problem is, if you are trying to use nursery trays, you need a big open area. The one this one is replacing was made out of concrete mixing trays, which are probably better than totes in terms of space-efficiency.
With a 3x3 you can fit like 2 nursery trays. It's a shame how none of the commercial E&F tables are designed to efficiently hold trays (plus they are all way too deep)I'd get 3 3x3's
I was worried about chemicals leeching off into my water when I was thinking of wood and some waterproof coating system. And plastic seemed like it might rip over time. I've seen a user who made one with some blue spray on rubber type paint. Never posted how if it worked.
6 mil poly will rip easy, trust me I sold and worked with liners for years. Go for something 20-30 mil for a liner and make sure its NSF certified ( food grade) like a poly propylene liner ( most city water reservoirs are lined with NSF poly propylene.
DOnt use a PVC liner or chemicals will leach into your water, use maybe a HDPE liner or a PolypropyleneI'd get 3 3x3's
I was worried about chemicals leeching off into my water when I was thinking of wood and some waterproof coating system. And plastic seemed like it might rip over time. I've seen a user who made one with some blue spray on rubber type paint. Never posted how if it worked.
It's sitting on a table made of mini-ties (http://allenbuildingcentre.com/catalogue_home/?PRODUCT_DETAIL=4023) -- it doesn't sag, even under hundreds of pounds of water (I had to rebuild it once, because 2x4's sagged)
