There's a huge variety of water filtration devices available... ones that attach to your faucet and others that attach to your water main when it comes into the home. Most of the time we consider a water filter to remove ugly tastes, especially that "chlorine" taste.
Now, if an inexpensive water filter does that, great, but for us it became hard to know when it's working. Sure the taste may improve. But when do you change the filter? Most of the time I'd end up forgetting. Surely after months and months, these filters weren't working as well as they should have. Perhaps all the bad things like chlorine and heavy metals I wanted to be rid of were starting to sneak through again.
All the water filters tried had this same weak point... my memory. But also my inability to really KNOW when a filter was no longer working.
We've had the pitcher for about four years and have only had to purchase replacement filters. For the first time ever, it's possible to know this filter is working perfectly... and, at rare times, when it isn't.
HOW I KNOW THE ZERO WATER FILTER IS WORKING
No matter what else you may say about any rival water filter out there, there is one way that I know the ZERO WATER filter is doing it's job. There's a second way and I'll mention that in a moment. Both methods are infallible but the second is a bit disconcerting.
So how do I know my water filter (or any water filter is working)? Easy... "Total Dissolved Solids" or TDS.
With the TDS meter supplied with this Zero Water pitcher, I can know if my pitcher (or the filter) is functioning adequately.
Water out of the tap comes with dissolved solids. For "pure" water, you want to take out these dissolved solids. Zero Water takes out 99% of the total dissolved solids ...
Every water drinker should place the TDS meter in water fresh from the tap and find out the total dissolved solids.
The amount of total dissolved solids can vary in the course of a day, but once water is run through the Zero Water filter it should be down to ZERO!
You can immediately SEE that this filter is working.
This author's tap water is routinely in the 250 to 300 range for dissolved solids. We have "hard" water ... not to mention whatever else is in it.
The Zero Water filter brings these total dissolved solids down to zero every time and there's no question the water is PURE.
Simply the fact that this filter WORKS and replacement filters seem to last a good bit of time, this Zero Water filter has proven to be the most efficient and affordable for our own home use.
We had tried the other filter pitchers without the TDS meters. We had even used an ultraviolet light and carbon filter combination, but this type of filter has proven itself again and again as far as we're concerned.
WHEN TO REPLACE A ZERO WATER FILTER
People buy a Zero Water filter so they won't filter the heavy metals and other chemicals in tap water through their own bodies!
Since people buy Zero water to have water with no total dissolved solids (or really 99.6%), people monitor each batch of water with the TDS meter.
When total dissolved solids reach 6 parts per million, it's time to replace the filter. No guess work... no replacing a filter if you haven't maxed out the one that's being used, unlike most "guess work" filters on the market or filters designed simply to take out chlorine.
Now here's the other way to infallibly know when to change the filter. I found out for myself the first time I got grossed out this way.
Having been too lazy to check the total dissolved solids with the meter Zero Water provided, I kept using the filter.
One night I filtered some water and got a big glass to drink.
It smelled fishy. It tasted fishy.
After googling it, that's another sign that your Zero Water filter has been depleted... simply changing the filter (and cleaning out the pitcher) solved the problem.
I wish I could say I hadn't done that again, but... one one or more occasions I've had to be reminded the "fishy" way!