Hot Tub & Spa Care
Can You Use an Inflatable Hot Tub in Winter?
Intex says not at 39°F (4°C) or below; Lay-Z-Spa Freeze Shield models can stay on and hold the water at…
Guides
Practical pool and spa care guides from PoolSpaKit.
Water Chemistry
How Much Baking Soda to Raise Pool Alkalinity
Add 1.4 lb of baking soda per 10,000 gallons to raise total alkalinity 10 ppm. Dose chart, worked example, CYA…
Water Chemistry
How Much Calcium Chloride to Raise Calcium Hardness in a Pool
Add 1.2 lb of 77% calcium chloride per 10,000 gallons to raise calcium hardness 10 ppm. Dose chart, worked example,…
Filters
How Much DE to Add to a Pool Filter
DE filters take 3–9 lb of DE by size: Hayward ProGrid 3.0–9.0 lb, Pentair FNS Plus 3.6–6 lb. How to…
Hot Tub & Spa Care
What Temperature Should a Hot Tub Be?
Set a hot tub between 100°F and 104°F for healthy adults and never above 104°F. Lower limits for pregnancy, children…
Hot Tub & Spa Care
How to Winterize a Hot Tub
Winterize a hot tub only if it sits unused in freezing weather: drain, blow out the lines, add propylene glycol,…
Water Chemistry
How Much Water Should You Drain From a Pool to Lower Cyanuric Acid?
Estimate the water replacement needed to lower CYA with a worked example, clear assumptions and pool-specific safety limits.
Pumps
How Much Does It Cost to Run a Pool Pump? Watts, Hours and Your Electricity Rate
Estimate pool pump electricity costs using watts, run hours and your local rate. Follow labelled examples and account for variable-speed…
Water Chemistry
Do You Need Algaecide in a Pool? When It Helps and When It Doesn’t
Decide whether your pool needs algaecide, what it can do, why formulations differ, and which water-care checks should come before…
Water Chemistry
Why Does a Pool Smell Like Chlorine? What That Smell Usually Means
Learn what a strong pool chlorine smell usually means, how chloramines form, why smell cannot replace testing, and what pool…