Quote Originally Posted by deranged chipmunk View Post
It's not the active ingredient I would worry about, it's the 30 or so other chemical compounds in it that aren't listed because they aren't required to. Kind of like how all motor oils have oil in them, but it's the other things they put in (detergents, stabilizers and such) that make them different. It may be safe, but i wouldn't want to be the guinea pig. That's all.

Propylene Glycol is the only thing that could be a problem, and it's used in small amounts in dog foods, it isn't a fuming chemical, but can be present if the eat it, ect. From what I have read online, the tiny amounts are safe., the rest of the ingredients are inert, or found in other pond liners, and ponds. Here is the chemical data sheet,
http://synta.com/images/MSDS/SYNTA_D...STORE_MSDS.pdf