Evaperation!!!

[Reef Pilot]

I have acrylic lids on my upstairs tank, and lexan on my downstairs tank. I clean them, maybe every couple months or so. And no salt creep. No fish jumping out, or humidity in the house. Doesn't seem to affect lighting either, and corals growing great. I will say lexan is better though, as it does not warp or lose its shape, and you can get by with much thinner material.

[hillegom]

Where would you get lexan from?

[fooman]

You should be able to get it at any glass shop . It is really expensive though. But what isn't in this hobby !

[Reef Pilot]

Originally Posted by hillegom

Where would you get lexan from?

Home Depot, etc... And yeah, not cheap.
http://www.homedepot.ca/product/poly...44-inch/924860
I bought 4 X 8 sheet at Industrial Plastics some time ago, and can't remember what I paid for it, but didn't think it was that expensive. I use the 1/16" thickness. You can bend a flange to gain rigidity where you need it. Also glues nicely with Weldon. And very good with light transmission, and used by commercial greenhouse.

What I like about it, too, is that it can be bent and shaped just like metal sheet, and does not break. Here is a 7" filter sock hanger I made from scraps for one of my sumps. Worked great.

Originally Posted by Reef Pilot