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I live in a hard water area. Until now, I've been using a standard water filter like Brita, which has worked fine, but I could never achieve the clarity I was looking for in my coffee.

So last week, I dipped my toe in the world of water recipes. I got myself a zero water filter, read up about remineralisation and made a few litres of coffee brewing water.

I wasn't sure what to expect or if it would make a difference, but man was I surprised! The difference is insane. It was the missing piece to tasty coffee that I had been searching for for so long. Needless to say, I'm sold now and theres no going back for me.

What concerns me us how much of a pain in the ass it is. I have to have a bottle for the mineral water concentrate, a filter jug for the distillation and another jug for the remineralised water. I don't know if I want all that hassle every day for the rest of my life.

So the question now is how can I streamline this?

I live in a rented city apartment, so space is limited and I can't make any big changes like under-sink ro installations. I have looked at countertop ro units, but they're very pricey

Is there anyone else here who makes their own water? How do you manage this? Any advice for someone who is just starting out?

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[-] Marthirial@lemmy.world 27 points 2 weeks ago* (last edited 2 weeks ago)

I live in a hard water area. Until now, I've been using a standard water filter like Brita...

I was hoping for a hydrogen reactor to make the water.

[-] forestbeasts@pawb.social 4 points 1 week ago

Reverse osmosis is so passé, it's time for reverse electrolysis!

-- Frost

[-] Khanzarate@lemmy.world 15 points 2 weeks ago

Definitely for ease of use, it's gotta be store bought gallons of distilled water and premeasured mineral packets.

Get a gallon, dump in the packets, store your gallon of coffee water. One jug, no liquid minerals to be finicky with, and you're done.

Plus a gallon of distilled water, at least in my area, is about $1.50.

For me, the gallon jug lives behind my coffee equipment, it's hardly noticeable unless I need it, and mineral packets sit under my filters.

[-] anytimesoon@piefed.social 6 points 2 weeks ago

This is a great solution if you can get distilled water from a shop. That's sadly not available where I live, so filtering is the only alternative

[-] Proprietary_Blend@lemmy.world 3 points 2 weeks ago

Can you share a source for mineral packets?

[-] Khanzarate@lemmy.world 3 points 2 weeks ago

Third Wave Water is what I use. I like it, haven't tried others, so I couldn't tell you if its better than others.

Its a bit pricy, I wouldn't say overpriced, but luxury, so I dont use it for every cup I make, but sometimes you just wanna be fancier about it, and I use it then.

[-] Proprietary_Blend@lemmy.world 2 points 2 weeks ago

Thanks. Are there different packets for different styles of coffee. I'm just dipping my toe in...

[-] Khanzarate@lemmy.world 3 points 2 weeks ago

There are, but I don't have experience in the differences between them, either.

[-] unmagical@lemmy.ml 11 points 2 weeks ago

Can you start with distilled water, like from a store? Then you at least cut out the distillation step (and the filters) and may even be able to just remineralize directly in the jug it came in. In the US it's about $1 per gallon (3.79L).

[-] grom_@lemmy.world 4 points 2 weeks ago

Or buy spring water and skip all of the steps

[-] AbidingOhmsLaw@lemmy.ml 11 points 2 weeks ago* (last edited 2 weeks ago)

6-staged filter and reverse osmosis system with a remineralization stage as the last. This gives me treated water for cooking, espresso, drinking basically on tap. My unit installed under the sink and needed a connection to water line, drain, and a dedicated spigot, so not sure how feasable that is for an apartment.

[-] FudgyMcTubbs@lemmy.world 5 points 2 weeks ago

I also have a 6-stage RO filter under the kitchen sink. Cutting the hole in the sink/counter for the dedicated spigot is probably where a landlord will take issue. But tapping water and drain lines also would be problematic, but at least it's out of sight.

I also put a whole-home UV filter on my cold water line after the sediment filter and softener.

At this point, I could put pond water into the beginning of my water system and have a clean glass of drinking water out of the ro spigot.

Well water, amirite?

[-] anytimesoon@piefed.social 4 points 2 weeks ago

Does that live under your sink?

Honestly, that seems like the best solution, if you own your own home. I'm renting, so I'm unsure about modifying the kitchen

[-] Imgonnatrythis@sh.itjust.works 4 points 2 weeks ago

There are small simple 3 stage systems. I have one that gets ppm down to 0-4. I don't think most people need a big elaborate one.

[-] AbidingOhmsLaw@lemmy.ml 1 points 2 weeks ago

Probably not, but in my area I have to worry about pfas.

[-] AbidingOhmsLaw@lemmy.ml 2 points 2 weeks ago

Sorry, you replied while I was editing, I had accedently clicked post before I was done. See above.

[-] anytimesoon@piefed.social 2 points 2 weeks ago

Thank you!

Yes, it sounds like quite a big piece of work for a rented space...

That is the dream setup, though.

What do you do with the waste water for the ro process?

[-] AbidingOhmsLaw@lemmy.ml 3 points 2 weeks ago* (last edited 2 weeks ago)

I did a quick search and found there are countertop versions

https://bluevua.com/products/ropot-countertop-reverse-osmosis-water-system

For the waste, it goes to the septic, but I'm going to start collecting it since it is already been through all of the other filter stages before the RO,planing on useing it for water changes in the fishtank.

[-] anytimesoon@piefed.social 2 points 2 weeks ago

Thats right, I have seen those units, but I dont know how reliable they are and they are not cheap!

[-] AbidingOhmsLaw@lemmy.ml 1 points 2 weeks ago

Yeah that one cost more than I paid for my set up with 3 years of filters

[-] brian@programming.dev 1 points 2 weeks ago* (last edited 2 weeks ago)

fwiw I've had this one for like 3 years now, no complaints. think it's slightly cheaper on ex amazon tho https://aquatru.com/products/carafe-countertop

[-] AbidingOhmsLaw@lemmy.ml 2 points 2 weeks ago* (last edited 2 weeks ago)

What a yucky/scammy/click baitty website vibe, what's with the "click here to reveal your secret discount" and the forced subscriptions &auto billing on filters?

[-] brian@programming.dev 1 points 1 week ago

yeah it's kinda awful, but I like linking directly to amazon even less lol

[-] AbidingOhmsLaw@lemmy.ml 1 points 1 week ago* (last edited 1 week ago)

It also just appears that you can't change the RO membrane? Can't tell because it's purposely vague, but looks like if you don't get the subcription you don't get any filter to start with and have to pay an additional $90?

Edit: its is RO but I don't see the RO membrane as one of the replaceable filters.

Edit 2: found the RO membrane, it's $60 every 2 years so yearly cost will be $120 ($90 for filter + $60/2 for RO Membrane)

[-] brian@programming.dev 1 points 1 week ago

the amazon one came with one of each filter. not sure about directly from them but I imagine it's the same?

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[-] BakedCatboy@lemmy.ml 2 points 2 weeks ago* (last edited 2 weeks ago)

I rent and have a 3 stage water drop RO that lives under the sink. The tap is screw on and can be removed when I leave, and the drain is similarly attached between the dishwasher drain and sink connection with hose clamps also easily removable. At my last place there was no hole for the spout so I just 3D printed a bracket to attach it to under the sink. My new place has an unused sink hole that I plan on putting it on here.

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[-] fritobugger2017@lemmy.world 1 points 1 week ago

Plenty of reasonably priced countertop RO systems. Pick one with final stage remineralization.

[-] zeppo@lemmy.world 5 points 2 weeks ago

I thought you meant with reverse electrolysis

[-] daychilde@lemmy.world 3 points 2 weeks ago

It's also an archaic way to discuss the production of urine. lol.

[-] anytimesoon@piefed.social 2 points 2 weeks ago

I'm not familiar with reverse electrolysis. What does it do?

[-] zeppo@lemmy.world 5 points 2 weeks ago

Electrolysis is where you use electricity to decompose water molecules into hydrogen and oxygen. Reverse electrolysis is where you turn hydrogen and oxygen into water.

[-] Imgonnatrythis@sh.itjust.works 13 points 2 weeks ago

This is the way. Buying water from a store or distilling it yourself, you really never know where the oxygen and hydrogen is coming from. With a reverse electrolysis system you can source oxygen from the rainforest of Brazil and hydrogen from the volcanoes of Costa Rica. The in cup effect really makes this worthwhile.

[-] Vandals_handle@lemmy.world 4 points 2 weeks ago

I find the flavor notes ruined when Costa Rican hydrogen is paired with Rwandan Peaberry. Mufumbiro sourced hydrogen is required for true connoisseurs.

[-] not@lemmy.dbzer0.com 2 points 2 weeks ago

That's the plebarian way. I run my fuel cell on hydrogen and oxygen. The energy generated is used to roast the beans and heat the water it creates. I pour my beans with 100% H20.

[-] BurntWits@sh.itjust.works 4 points 2 weeks ago

I just buy distilled water from the grocery store and remineralize that. They come in 4L bottles in Canada, but I’ve heard in the US they come in gallon sizes, then you just get your mineral packets, combine and mix. Really easy.

[-] xylol@leminal.space 4 points 2 weeks ago

I just buy water and refill my five gallon jugs from one of the local water filter shops, we use it for all drinking and cooking

[-] Rai@lemmy.dbzer0.com 4 points 2 weeks ago

Zero water filters are great, but when the filters go bad, they go BAD. Other filters I have, you can just kinda keep using an old filter and it’s fine, they just don’t filter as well. With zero water filters, the water starts tasting like lemony sour fish as soon as it starts testing like 10 TDS… the water from the tap reads like 330 and doesn’t taste that bad.

[-] anyhow2503@lemmy.world 2 points 2 weeks ago

That's because the TDS meter doesn't measure contamination from organic sources, unlike your taste buds and nose.

[-] kettuli@lemmy.world 4 points 2 weeks ago

The water quality straight out the tap is so good I’ve never felt any need for warer alchemy. But I do get that some places have way too heavy water.

[-] anytimesoon@piefed.social 1 points 2 weeks ago

Thats very lucky.

Tbh, a regular filter works fine. I get a very nice coffee from it, but it's not perfect. With remineralised water, it is another level. I was a bit sceptical that it would make such a big difference, but here we are...

[-] albbi@piefed.ca 2 points 2 weeks ago

I also have hard water and use a Brita for my drinking water, but never considered it for my coffee. Now I'll have to give that a try. I haven't gone with the Zero water filter system because that takes pretty much everything out. I think it's important to keep the minerals in your drinking water.

[-] BurntWits@sh.itjust.works 1 points 2 weeks ago

Some amount of minerals is good, but you don’t want too much. If it’s just for drinking it’s not a big deal, it might just not taste as good. But if it’s going into any kind of a machine, you don’t want super hard water.

When I got my pouring kettle, at the same time I switched over to mineralizing my own water. Tap water has never touched my kettle, only what I formulate. I have not had a single bit of scale buildup anywhere, the inside of my kettle still looks brand new. In a kettle it isn’t as big of a deal but in a coffee machine, especially espresso, scale buildup can cause actual damage over time. Yes, you can use descaler, but it’s easier to just use proper coffee water. Get zero water, distilled water, RO water, whatever, and add mineral packets to it. Saves a lot of time in maintenance and also tastes better too. A win-win.

[-] albbi@piefed.ca 3 points 2 weeks ago

If you're using a coffee machine, that makes sense. I just use a French press now. I stopped using coffee machines when I couldn't easily find one with no plastic parts. I really don't want my hot water being piped through plastic tubes.

[-] BurntWits@sh.itjust.works 3 points 2 weeks ago

Fair. The only machine I use is my Gaggia Classic Pro, but honestly 99% of the coffee I drink is from my manual lever espresso maker. Zero plastic parts in it. The only bit of plastic in my entire setup is my grinder’s catch cup which I’m considering replacing in the future anyway.

Here’s my regular setup if you’re curious:

[-] fritobugger2017@lemmy.world 1 points 1 week ago

There are a ton of countertop reverse osmosis filtration units in the $100 to $300 range. Find one that has a remineralization stage and go with that. Should give you a TDS in the 50ppm range which will be fine for pour over.

[-] Zensate@lemmy.world 1 points 2 weeks ago

I'm a huge nerd but I actually found that buying good mineral waters and such, didn't do much for me. I guess I grew up with shitty water and I need a bit of that in it.

I did find that Britta's extra strong filters were more than sufficient to deal with my otherwise hard water.

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this post was submitted on 03 Oct 2026
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