Originally Posted by mandarin w
You say the springwater is the cheaper option, but do the math, Even using your numbers. 20 gallons at 69 cents is what $12 or $13 dollors and week, if you do your weekly waterchanges. in a month that is $48 dollars or even more. Then add in water for you top offs. and it will be even a little higher. In two months you could have bought the unit, and had much better water for your tank, Not to mention "Spring water" is not Reverse Osmosis water.
Agree whole heartedly . . . I've probably run 200 gallons (At least, probably a lot more) through my RO/DI since I got it about three months ago (Filling tank, water changes, maintaining a bucket of extra LR, dealing with a QT) . . . 70 cents/gallon store-bought darn near puts the thing paid for. And that's not including the time, hassle and expense of going to get water from a store.
Also, having the water in-house is a tremendous asset . . . think about it, how many very needed water changes, top-offs, etc have gone undone because there was no water in the house and it was just too inconvenient to run out and get some. The "I'll get it tomorrow" unfortunately tends to turn to "Darn, forgot today, I'll get it tomorrow" several times over.
Now in essence, an in-home RO/DI unit isn't mandatory . . . but geez it sure is an added convenience that really makes atremendous difference. Anything that makes maintaining the tank easier (And therefore more likely to happen correctly) has to be good. Like not having test-kits and having the LFS run your water . . . gotta grab some water, run off to the store, wait for them to do the test, then go home and deal with anything the tests reveal.