Crowd thread digest
What the crowd said: best water for fish tanks
What’s the best water for fish tanks?
Thread quality (estimated)
0 to 100. Qualitative, not a verdict on who was “right.”
Fast pile-on: an opener with rough tap + remineralized RO, many short takes, regional tap stories, nested replies (distilled vs minerals, bottled brand pushback), and a big “wet water” joke cluster.
Real disagreement on bottled/RO/distilled and whether retail water is “safe” as-is; sparkling-water gags get serious corrections; less flame war than mismatch of assumptions.
A shared drumbeat that fish and target parameters should drive the answer, and that plain untreated tap is not always interchangeable with remineralized or wild-caught needs.
How we scored it: Qualitative estimates (engagement, disagreement, overlap), not a formula on raw reply counts.
Answers rolled into five bands
Percentages are approximate share of distinct takes in the thread (including humor as its own category).
Most common: “comes out of my faucet” and city water OK; regional reality checks (discolored or staining tap, old pipes) explain why some keepers do not use raw tap; under-sink filtered then dechlor 22%
Well water (raw or for guppies), spring water, jug/bottle from the store 17%
Remineralized RO when tap is wild (e.g. nitrate, GH, pH swing issues); half RO / half city + conditioner; whole-house filtration; distilled/rain for top-off vs remin on big changes; brackish: filtered + dechlor as needed 21%
Pick species, then source; soft-acidic vs hard-alkaline vs neutral+hardness; fresh vs salt; a few nods to “like the wild” framing; borrowed tank water on change day + RO floated as a hack 20%
“Wet water,” H2O, sparkling / fancy bottled punchlines, “clear,” etc. - often shot down in replies 20%
Where it got argumentative
- Bottled / brand-name water: a grocery-store brand suggestion drew a direct reply that retail water can carry unwanted mineral / additive chemistry for fish.
- Distilled, rain, or “pure” jugs: enthusiasm vs a reminder that big changes may need remineralization while top-off is a different job.
- Some taps are not OK raw: first-hand stories of swings, nitrates, or bad color - contrast the generic “tap is fine” line.
- The thread mirrors what guides say: match GH, KH, pH, and TDS (and salinity if marine) to the livestock - then pick a source you can keep stable. See water parameters and tap water in aquariums for a structured baseline.
- Use our wait-before-fish digest and cycling digest alongside parameter testing, not instead of it.
- Log water readings in App-aquatic so changes in tap or well seasonality don’t surprise you.
Note: Crowd threads mix experience levels and agendas. Use this page to see what people said, not as veterinary or husbandry fact. When in doubt, test and follow reputable guides.
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