...I find the minimal investment in a Brita Jug to be worth the while!

For a measly eleven bux, where I live, you can get the smallest one, which comes with a filter that will cost you 6-9 bux to replace anyways. I mate the 'inside-of-the-jug-thing' that holds the filter with my Five Gallon Pail, and make a bunch of nice clean water that way. For cheap.

PH it, and your plants can't be happier (unless you spend a LOT more money!)