Category
Test kits
9 products — ordered by how often we mention them.
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VARIFY Water Hardness Test Kit (0-425 ppm, 150 Strips)
Default pick for first-time testers sizing a softener — 150 strips, 0–425 ppm range, under $10 · Know your gpg before you buy any system
$9.99
in 10 guides
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JNW Direct Water Hardness Test Strips - 150 Strips Kit
Same specs as VARIFY (150 strips, 0–425 ppm) if you want a second brand or the first is out of stock · Bulk strips for repeated well-water checks
$9.99
in 6 guides
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Hach Total Hardness Test Kit, Model 5-B, Drop Count Titration
Industry-standard drop-count titration — ±0.5 gpg accuracy for borderline cases and professional use · Drop-count titration for precise gpg when sizing a softener
$35.55
in 2 guides
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HM Digital TDS-3 Handheld TDS Meter
Post-softener verification — measures TDS to confirm ion exchange is working. NOT for initial hardness measurement · TDS reference reading — not a direct hardness test, but useful as a quick check
$14.50
in 2 guides
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HoneForest TDS Meter, Digital Water Tester (TDS, EC, Temperature)
Alternative TDS meter that also measures conductivity and temperature — same softener-verification role as HM Digital · Get a precise TDS number instead of color-matching strips
$13.97
in 2 guides
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WeAQUA Water Hardness Test Kit — DoubleCheck 50 Strips
Cheapest option at $5.97 — dual-pad design lets you verify each reading; 50 strips, fine for a one-time test · Two-pad design that separates low (0–25 gpg) and high (25–250 gpg) ranges — fewer false reads if your water is on the harder end of the scale.
$5.97
in 2 guides
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Hach Total Hardness Test Kit, Model 5-EP
Higher-range Hach drop kit for very hard water (20+ gpg) where the Model 5-B runs out of drops too quickly
$58.09
in 1 guide
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Hardness test kit (drop test) — placeholder ASIN
Know gpg before sizing a softener
$14.99
in 1 guide
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Instant 4-in-1 TDS Meter Digital Water Tester
Modern TDS/EC/temp meter if you want a digital reading alongside strips
See Amazon
in 1 guide