@Toneri Ōtsutsuki Funny you should ask. Answer: Me. We moved from a place where city water was fantastic (Edmonton, in Canada) to a place that wasn't so good and the house had filters. Purely out of ignorance (not willful, but ignorance nonetheless) I didn't understand the ideas behind filtration of water. Videos like this have been a great help so now we change our filters on time and enjoy both good flow rates and great taste. But I recall my eyes being opened about filtration... Yikes!

@@taeseong9944 C'mon now, that wasn't necessary.

There are standards that have certain numbers to demonstrate the effectiveness of removals. Iodine Number for organic chemical effectiveness, Peroxide Number for reactivity rate. Molasses Number for color removal And Tannin number for tannin removal. In our area we choose to use a carbon that is decent in all four numbers - not just one or perhaps two.

Take a pre filter - sediment filter of 0.5 - 1 micron, and take carbon activated filter block of 1 micron absolute rating. Thereafter put a post sediment filter of 0.5 micron again before passing that through the ultrafiltration etc.

You are right. Knowing as to when the filter to be replaced is somewhat tricky. What l do that I keep the filter candle in a transperant housing. When I see that the colour of wrapping of filter turned brown I replace it. One more trick will keep you away from risk and prevent your apprehension of getting the ro membrane damage is that use two carbon activated filter in series and a sediment filter of.05 or 1 micron in between the ro membrane and carbon activated filter.

Check out the manufacturers datasheet for the filter to see what the specific capacity of the filter is for certain pollutants. A carbon filter cannot be reactivated, it as to be discarded after usage.

you have to change your filter every 2-4 weeks

@@taeseong9944 2-4 weeks? I was told even 6 months depending on use... Was it false?

@@pedecia i dotn know...i change mine every year soooo....my fish are probaly poisoned by now

Best way is to count the gallons that ran through the filter. Second indication is time. I change them at least every six months (refer to the manufacturer specification or local code). Th third indication is reduced flow. With a lot of sediments in the incomming water, the filter might become blocked quite fast. In this case a sediment pre filter might be recommended.

It is not a good idea to wait for bad taste or colour of water because it is a matter of drinking water. You are going to lose nothing if make a rule to change at least once in six months. Other good idea is to use two in series and replace the previous one in one year when you installed both at the same time. Thereafter when replacing the first one after an year, the new carbon activated filter should be installed at the place of second one and the existing second one should be shifted to the position of first one. Now at the interval of 9 months or one year you can repeat the process.

You should go by the manufacturer's recommendation for filter replacement. Also, a reduction in flow or a change in taste is al way tell your filter needs to be replaced.

Depends on the application.

@@MyTrevonne healthy drinking water, filtering tap water

I think your best bet is reverse osmosis. They make ion exchange resins for some of those materials, but I am not sure if one of those resins will take care of each type of metal.

Activated carbon is suppose to

a bit, but some are as small as 0.3 microns so reverse osmosis would be the most effective method

Each manufacturer should rate them by gallons or months of usage. They typically underestimate the capacity so you do not run out if you follow their guidelines. A change in water taste or a drop in water pressure are signs to replace filters.

Probably not. Pfas by definition are "non stick" since they are used for the pans. It's not gonna adsorb to charcoal I think. Reverse osmosis will work perfectly against it.

Thanks for your input! 😊