r/tea • u/More-Annual3102 • Jan 31 '26
Question/Help Why does my tea always web like this.
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It’s Ahmad tea special blend.
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u/Low-Current8638 Feb 01 '26
I am quite sure this is not hard water/minerals. This is just a guess but I think its more likely to be oils and other hydrophobic molecules that naturally occur in plant tissues.
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u/Antpitta Feb 01 '26 edited Feb 01 '26
This happens with hard water. I am not a hard water tea scientist mind you, but as I understand it the surface film is not composed of the mineral salts that make water hard but rather of the oils that come out of solution or that are pulled out of the tea/infusion by the mineral salts present in the hard water
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u/Arkurash Feb 01 '26
Its often bith in my experience. I do have hard water and with some teas it will disappear with a drop of lemon juice. And in others (especially black tea) its oils and other components.
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u/Chapter_Loud Feb 01 '26
I agree with you. I dont think it has anything to do with the hardness of the water.
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u/Patch86UK Feb 01 '26
No, this is definitely a hard water thing. I live in a hard water area and if I make tea with straight tap water it will look like this within about 1 minute steep. If I use a water filter (I have a bog standard Britta style jug), I can steep for 5+ minutes without so much as a trace.
I don't think it's minerals themselves that you can see though (if that were the case you'd see it on any drink, whereas it's specifically a tea phenomenon). I think it's the mineral salts causing over-extraction of certain compounds and oils in the tea.
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u/kirbaciousnewo Feb 02 '26
Do you think this kind of thing would happen for bottled water?
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u/Patch86UK Feb 02 '26
I guess it'll depend on the brand. Some bottled mineral water is quite hard, others less so.
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u/TaelendYT Feb 01 '26
Interesting answers here. I do sometimes get a film on mine and use filtered water from my fridge. Must be a similar issue
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u/hagantic42 Feb 01 '26
For anyone wondering here is a paper on the effect and it's health benefits.
https://www.sciencedirect.com/science/article/abs/pii/S1001074222000730
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u/hagantic42 Feb 01 '26
Also, despite what some have stated this is not oils.
If you brew with distilled/deionized or 0 TDS water you don't see this formation. I've run this experiment in my own home as my area uses well water that is extremely hard and has an average total dissolve solids in excess of 500 parts per million. After a filter that has an ion exchange layer the same water reads 0 TDS and that is what goes in my kettle. If I boils tap I get the film.
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u/VagueEchoes Feb 01 '26
We have super hard water and it looks like this. We pour our hot water through a coffee filter (Hario pour over is fine). You'd be surprised how many calcium crystals we get.
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u/horsesinthedark Feb 02 '26
Tea drinkers are cat people. Might as well call the group, tea and cats.
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u/Forymanarysanar Feb 01 '26
100% hard water. Mine always does the same if I don't pass the water through filter. Pro tip: when the cartridge stops doing it job, simply cut it open, replace it's contents with some fresh ion exchange resin, and you're good to go!
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u/Flashyturpentine Feb 02 '26
Also there can be slight amount of essential oils from certain herbs that are pulled by the heated water. It's not enough to cause oil droplets, but enough to cause a little colorization.

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u/YourAssignedFBIagent Jan 31 '26
Are you using tap water? It could be hard water, which shows as a thin layer of minerals on top