Courses
Underground Aquarium · Free course
Water Chemistry Made Simple
pH, hardness and temperature in plain English
~30 min 7 lessons Certificate + profile badge
Understand the numbers on your test kit without a chemistry degree. Learn what pH, KH, GH and temperature mean, why steady water beats "perfect" water, and how your tap water affects your fish.
Free · No prior experience needed
What you'll learn
- 1Why steady beats perfect
- 2pH: acid or base
- 3KH: your pH bodyguard
- 4GH: soft and hard water
- 5Temperature
- 6Your tap water
- 7Final exam
Earn your certificate
Finish every lesson and pass the quizzes to earn a shareable certificate and a “Water Wise” badge on your profile.