It was one of those sub penny stock companies that get this, produced nothing, sold nothing, made nothing, did nothing except acquire mineral rights to unproducing gold mines on the speculation that they could hit gold.

The acid brings all of the minerals to the surface in the grout and would remove the stain, its just so risky dealing with the proper ratio of water to acid and could do more harm than good if you didn't clean up the area properly.

As you know The Mexican state grants a mining concession (a permit to explore and exploit minerals in the subsoil) so I have 3 gold mines in store but no idea how to sell it, any ideas?...

Over time minerals in the water build up in the bottom and cause the tanks to rust from the inside out and decrease the life of the appliance.I worked for an appliance company all throughout high school, you'd be amazed how old some of the units were we pulled/replaced for customers.

I remember back in the early 1980s the mineral rights under my house, as well as all the others in the development, was sold or leased to a wildcatter who “slant” drilled for gas under our property.

I've heard theories about minerals in the water, and poorly done joints causing micro-currents which in turn cause excess erosion at those point of the pipe.Given that it's happened multiple times I'd be nervous about leaving the rest in the house, personally In my mind I'd be making plans to do just as you suggested - replacing everything with PEX.

The RDA for vitamins and minerals is the "recommended" daily allowance for the "average" person.

Hopefully I'll finish the repairs and have mine rented before the end of the month but my wallet and credit will still be sore for a couple of months afterward.

(emphasis mine.) Really

I worked summers as a coal miner while pursuing a double undergraduate major, a stint in Law School and an MBA.