MacTrev, there are a lot of threads on rusting pipes and solutions that have been put into place, so you may want to dive into the older posts and try looking around.

Here are a couple of links in case you haven't found any yet in your searching:

Rust 1

Rust 2

Rust 3


Besides these threads, any experts have an idea for MacTrev?

Todd La Neve

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1.5 & .5 ac ponds - LMB, BG, RES, YP, GC, HSB