Pool and Hot Tub Water Records
A spot reading is one frame from a film. Logging chemistry as a series shows what your water is doing, and filter pressure tells you more than you think.
Guide
Water and pools · WP-02
Hot Tub Water Care Log
A free printable hot tub log — sanitiser, pH, alkalinity and hardness readings, chemicals added, plus filter cleaning and drain-down records.
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2 pages. Choose your paper size — both versions are laid out identically, so neither one gets shrunk to fit.
Print it and write on it
Fill it in type and save
The fillable versions have real form fields — open them in any PDF reader, type into them and save. Printing help.
What this sheet is for
Keep on top of chemistry in a small volume of hot water, where readings move fast and drain-downs are on a schedule.
Who it is for
Hot tub and spa owners, and hosts running a tub at a holiday let.
How to use it
- Record the tub volume, sanitiser type and filter part number once.
- Test frequently — small volumes change quickly.
- Log filter rinsing, deep cleaning and replacement separately.
- Note the drain-down date and when the next one is due.
What is on the sheet
2 pages, in this order:
Page 1
Printed under the title: Water care and filter record for a hot tub or spa, where the small volume means chemistry moves fast and drain-downs matter.
Read your own manufacturer's ranges. Target ranges come from your tub manufacturer and your test strips, and differ between chlorine, bromine and salt systems. This sheet records what you measured and what you added; it does not tell you what the numbers should be.
Write-on lines: Tub make & model · Volume · Sanitiser · Filter part no. · Last drained · Next drain due
Table, 20 rows: Date · Sanitiser · pH · Alkalinity · Hardness · Temp · Chemicals added · By
Page 2
Filter and drain record
Table, 14 rows: Date · Filter rinsed · Filter deep-cleaned · Filter replaced · Drained & refilled · Notes
Ruled lines: Notes and anything specific to yours
Questions
How often should a hot tub be drained?
Manufacturers usually give an interval based on volume and use — heavier use means more often. Follow your own manufacturer's guidance and record the dates here.
Do let properties have extra duties?
Often yes. A tub provided to paying guests is usually treated differently from a domestic one, with more demanding water management requirements. Check what applies where you operate.
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