pH

For one or two containers, a liquid test kit is the better buy. A pen earns its place when you are testing several containers or want exact numbers. Liquid Test Kits You put a small sample of solution in a vial, add a few drops of indicator and compare the color with...

A rising pH is normal in a Kratky container. The plant itself pushes it up as it feeds, and hard water and algae add to the effect. The fix is regular testing, small corrections and a full change of solution when it will not hold. Cause 1: The Plant Is Feeding Most of...