If you don't have a digital pH meter, these do fine. Those low end digital meters for $75 or so stop working after 2 years. This is the better cheap option vs very expensive pH meters.
M
Mark
Reading pH Test Strip
The 1 review before mine stated that his known pH previously tested at over 8; then he knocks his current test strip that is rated to read from 4.6 to 6.2.
J
Jacob
Worthless
These strips are worthless. Testing on my city treated and tested tap water (pH 8.8) they read pH 4.6. Don't buy.