Metal stock tank?

[Adam Shivers]

I have read somewhere (and don't remember where) that it isn't good to keep fish in a metal container. Is this true in whole or in part? (certain kinds of metal) and does the same go for grow beds in an AP system?

[Adam Shivers]

we are better at doing things cheap than just about anyone around here but I have learned so many ideas from everyone here and warnings -because there is a specific purpose- (method to our madness)