Dont know if it matter at all except maybe after 10 years there making them out of something else. I apologize for being so insensitive to youWhat does it matter how long it's been? If you have a question. And you never see a direct answer. In the thread and you read the entire thread about what's your specifically asking for I know I read post about people using them in sumps and stuff like that.But who's to say that they're not freshwater systems, I want to know about a marine system
Last edited:


