need help

I have a 10x6x7ft plastic greenhouse. I used pool noodles as extra roof support to prevent water pooling on top where there is no pole support. This did prevent water from pooling but the pool noodles started deteriorating and leaving small plastic particles all over my vegetation. Any ideas of something curved I could use in place of the noodles?

Carmen, welcome to the forum!  Can you provide an image of the general greenhouse structure?  Is it arched, or peaked?  What is the structure made of (e.g. PVC, metal, or wood)?  Is it a prefabricated greenhouse or homemade?  It sounds like you're using a plastic cover that is not fitted/seamed.

We've bent metal electrical conduit to make different shaped low tunnel greenhouses and arched cattle panels to make taller greenhouses.  I wonder if either of those could be shaped to match your roof.  Small diameter PVC pipes are also used as supports in some arched greenhouses.  Alternatively, could you stretch the cover material tighter?

First option is PVC pipe.  But supposedly it causes slight chemical deterioration in the poly sheeting so while I might use it for rigidity I would use standard black as a slip cover over it.

Lesson learned doing the solar curtain.  The wood curtain rod from the local lumber yard is 1 1/4 and a snug fit down 1 1/4 black poly pipe.  Be aware wood on poly scratches it a tiny bit making it foggy where it rubs.

Carmen, I agree with Burton, more information, images are really needed so we can comment.