Acrylic lid thickness.

[TexasMFK31]

https://www.greenhousemegastore.com...gsutbo-c-cnnccyuim2nivlqx5l81lnyaap8fealw_wcb

The 1st review is a fish tank lid on this product page.

 

[Muni]

https://www.greenhousemegastore.com/coverings/polycarbonate/easy-ship-2-ft-wide-twinwall-polycarbonate?returnurl=/coverings/polycarbonate/?gclid=cj0kcqia8f_ebrdcarisaekwrgezn10_o6lklvhlb1u9qsagsutbo-c-cnnccyuim2nivlqx5l81lnyaap8fealw_wcb

The 1st review is a fish tank lid on this product page.

This stuff works awesome. Looks nice, is extremely light.

 

[markstrimaran]

1/2" 8" x 21?" Spans the half on a 75. It blows about 1/4" in the center. I flip them every 6 months.