Twin-wall Polycarbonate Aquarium Lid vs Screen ?

[427HISS]

I just watched the video below, and this guy used a sheet of polycarbonate as a lid.
What do you think about this product versus the plastic screening

It did not seem,..... like it reduced the amount of light going into the tank by a large degree ?

Home Depot-

http://www.homedepot.com/p/72-in-x-36-in-x-5-32-in-Twinwall-Plastic-Sheet-COR-3672/202771364

 

[Supurderek]

I like polycarbonate more due to durability and resists warping better. It will decrease par vales somewhat the same. If you are worried, just make openings with netting.

 

[Mebeknob]

The polycarbonate will also help with splashing and evaporation.

 

[427HISS]

Does open netting have less light impediment than the polycarbonate ?
What percentage of loss with both ?

 

[Supurderek]

It's very hard to determine exactly since each company may make theirs slightly different. Also thickness plays an important roll. I would say usually cuts about 5-10% for open netting and 20-30% based on my experience for complete cover.

 

[DereksReef77]

I am glad I saw this, tried to make it over to menards this weekend but didn't make cause of the weather. Hopefully I'll get some this week. I want to start covering sumps to cut down on humidity and evaporation. Looks like a great product.