Which store bought water gallon is best for my growing plants

I get spring water gallons or should I be using something else

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A lot of people use Wallymart water 5 gallons is cheaper than most others if you have only 1 or 2 plants you could look into zero water pitcher or brita filter.


The one you pay for monthly or quarterly


Might be cheaper to have a water service, with way less waste.


I use the Glacier fill up stations. $1.25 for 5 gallon bucket.


So it’s store bought spring water over distilled water any day?

Yes!..Here we already pay enough for water…My first outdoor grow I used store water until I realized I would need way more then I was willing to buy and its not easy carting gallon jugs from here to there!..I started collecting rain water in the winter early and spring this and last year…It only lasts a while then I use “tap” water…I let it sit out in the sun for a day or two…no problems… They don’t use chlorine anymore so I’m good to go


The fill up stations in the front of some grocery stores are RO water. Cheaper to refill a five gallon jug than buy gallons. I’m going full tap on my current grow just to see how it goes. I’ve heard different opinions, but if you’re tap water is under 300 EC I’d say it’s okay to use. @AL_GREEN makes a good point. Aside from the barrel rain water is free. IDK about where you’re at, but spring means a lot of rain for me.

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If you buy store ‘Spring Water’ it’s likely just lightly filtered TAP water to remove chlorine/fluorine and a few other things… If it doesn’t say “purified” or “distilled” you are literally rolling the dice on what it is, under FDA rules it can be straight-up municipal tap water, lightly filtered municipal tap water, heavily filtered municipal tap water or tap water with minerals added… It could also be RO or distilled water that has been re-mineralized, you simply don’t know…

If you want ‘pure’ water get something that clearly states purified or distilled on the label… The RO refill stations at grocery stores are the best bang for the dollar if you don’t want to set up your own RO system, but note that when you first purchase the original 5 gallon jug already filled that is generally re-mineralized RO water, not the straight up RO that comes out of the refill machines…

And last but not least spend the $10 or so for a dedicated TDS meter for your water, this way you can instantly test the RO water at the refill station as you fill it to make sure it’s being properly filtered… I know some refill stations are mostly automated, but I pick the refill stations that allow you to turn the water on/off as needed, that way I can bring a small cup, fill it up and test it before I fill my jugs, this way I know for sure the RO machine is working…

Another option for outdoor grows if you just want to get away from the chemicals found in municipal water, around me most of the forest preserves have old school hand pump wells to ‘cool off’, wash up or water your pets, it says do not drink because it’s not tested and regulated, but it’s groundwater and plenty good for outdoor plants… Might be OK for indoor plants but you would really have to have it tested to see how hard it is and how many minerals you have in it, because if it’s anything like my well water it could make a rust/calcium mess of your indoor growing median and sorts… Not that big of a concern with an outdoor grow as nature will take care of diluting it and not confining it to a pot or grow bag area… FYI: I used to get my fish water to fill my aquariums from a local forest preserve hand pump well vs dealing with my municipal water that was worse :rofl: Yeah it was a hassle but what I did was at home I had multiple 32 gallon BRUTE (Rubbermaid brand) garbage cans, I would stop by the forest preserve on the way home fill up several 5 gallon buckets, take it home and store it in the garbage cans until I needed it, that way I always had over 100 gallons on hand…

And last but not least, if you have a little land and some spare time and don’t mind getting your hands dirty, Google up “DIY shallow well drilling” it’s literally a weekend or two project, and you can drill your own shallow irrigation well… Note, to be 100% up and snuff you would likely need to pull a permit to drill the well, but to be blunt I doubt most do for shallow wells like this…

I understand that spring water has nutrients/electrolytes added for taste…Distilled or RO or run thru a ZERO water filter is what I would recommend for your best product

When i bought water from walmart i used the spring wayer becasue it has been through the reverse osmosis process.

@Hotbox420 After many grows using RO water for plants and distilled for humidifiers I did the math and found I was spending about $110/grow on water. My grows are 4 each grow in 4x4s.

I bought a 50gallon 4 filter RO Buddie.

The fourth “DI” filter can be used to make similar to distilled, and bypassed to make regular RO water with just two filter and the membrane.

Cost me $69.00 from Amazon, it comes complete… And filters need changing after approximately 1500 gallons.

Now I use the 5 gallon and 3 gallon refill jugs from store at home… Plus I save gas and the trouble of sitting at store whole filling and lugging around the jugs.


I have 2 of these systems installed. Pre and post filters changed at 6 to 9 months and RO membrane every 2 years.
PPMs read on average 10 with a low of 6 and a high of 14. We use RO water for drinking and cooking so if you only use it for growing you may go longer between filter changes. Easy to install.


My tap water 80-ppm so I don’t worry about distilled water so much just the chlorine. This is my setup for getting rid of it. Cheap and simple. I refill our lizards/snake gallon bottles


That works if your water treatment plant uses old-school chlorine, but if it uses chloramines (like most do nowadays), neither aeration nor boiling is an effective removal process… For chloramines, you really need a chemical de-chlorinator, carbon filter, or have to use an RO/distillation process…

One really nice thing about RO water is that it removes the variable of ‘what else is in the water’


Yep, it really makes everything more simple as there is no what-if you know it’s just water, this is even more important to hydro systems where you don’t have soil that provides a buffer to any potential changes or trace elements in the water…

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@Outlaw thanks man! & others who posted about water… Yeah I guess it does all depend on where and what concerning water…My first grow (like stated above) I was all paranoid and wanted everything to turn out okay…I read a lot here on ILGM and other places to find out about water…The store bought got to be too much…yes the 5 gallons are cheaper but…they are heavy and bulky…I did and experiment and use municipal water (yes they do use chloramines…no chlorine anymore…I was worried but guess what?..I saw NO adverse effects on the plants! I cant remember exactly what member it was but he was old school…didn’t really but into all the hype…He believed in good soil…water nutes etc…reading his view made me try the unfiltered non R/O water…I had zero problems with it…* for what its worth


I’m in the RO Buddie camp:) Costs like $60, takes about 45mins to setup and then I have a five gal water jug in the tub - fills itself in 2.5hrs. I then have an electric water pump to pour water from by 5 gal into my 1 gal jugs, so that I don’t waste much RO water. I’m all about the ritual of things. Nothing like a little work on the front end to avoid trips to the store every few days. Don’t want my neighbors wondering why I always have 10 gallons of water every few days.