Chloramine in Tap Water: Test on Houseplants First

City water uses chloramine (chlorine + ammonia). Safe for carnivorous plants? Depends on concentration.

Simple Test

If your regular houseplants thrive on tap water, your CPs likely will too—provided mineral levels are low.

No universal rule. Test on non-CPs first. Or use rain/distilled/RO to be certain.

Carnivorous Plants: Do Carnivorous Plants Need Minerals Added to Reverse Osmosis Water?; Tacoma, WA Tap Water Unsuitable for Carnivorous Plants (156 ppm); Optimal Soil Mix and Watering for Mexican Butterworts (Pinguicula); Testing Bay Area Tap Water for Carnivorous Plant Safety; Using Reverse Osmosis Water Filters for Sarracenia During Travel; Attractive Pot Options for Carnivorous Plants: Glazed Ceramics and Drainage Essentials; Using Pond Water for Carnivorous Plants: Test TDS First; Garden Hose "RO" Filters Are Not True Reverse Osmosis; Overwintering Sarracenia in Western New York (Zone 5–6); Tap Water Analysis for Carnivorous Plants: Is Your Water Safe?

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