Tutorvo

Water Changes: Dilution, Repeated Changes and the Steady State

Lesson 2 of 816 minLab

This lesson is part of the course

In this lesson

You calculate what one water change does to a reading, find the level the tank settles at with weekly changes and steady build-up, project every week with one closed formula and work out with logarithms how many weeks it takes to get below a limit.

Buy the course once for $9.99 to unlock every lesson and lab, the final exam and the certificate – lifetime access, no subscription.

Lessons in this course

  1. Tank Volume: Shapes, Litres, Gallons and Net WaterLab14 min Locked
  2. Water Changes: Dilution, Repeated Changes and the Steady StateLab16 min Locked
  3. Change Schedules: Keeping the Peak Under a LimitLab15 min Locked
  4. Dosing by the Label: Water Conditioner and Fertiliser (C₁V₁ = C₂V₂)Lab15 min Locked
  5. Heater Watts and Filter TurnoverLab14 min Locked
  6. Stocking: Adult Size, a Fictional Rule and the Current LoadLab14 min Locked
  7. Running Costs: Watts, Hours, kWh and the Monthly BillLab14 min Locked
  8. Water Test Log: Rolling Averages, Out-of-Range Counts and a Trend ChartLab14 min Locked