9#Anniehui * W3 o3 y+ \$ n' t* U5 y 3 k5 M8 [! O) HIs it your greenhouse ? Look like it is a kind of transparent sheet attached to the wood frame, not glass or anything, right?
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$ C6 b6 z* N6 e. B% V2 v1 K4 Q3 cMy husband seals the plastic layers himself, then use a small fan to blow air between the two layers. The plastic can only be bought at Horticulture supply stores.