Cement use in FOWLR tanks

[Delphinus]

The short answer is it's not available locally in Calgary. There are substitutes that look like they ought to be OK though. So, the question is, take a calculated risk with one of those, or maybe do a group order from that one site that does mail-order? I'd hate to think what shipping will be like though.

Here's the link (you can't order online though, have to call).
http://www.chargar.com/Products/prod_mf.html

What do you think, should we do a group order maybe???