Comparisons
Saltwater Generator vs Chlorine Tablets: Which Is Easier to Maintain?
Compare salt generators and chlorine tablets by refilling, testing, CYA, cell care and operating limits to choose a maintenance routine…
Guides
Practical pool and spa care guides from PoolSpaKit.
Pool Care
How to Clean Pool Waterline Tile Without Damaging the Finish
Clean pool waterline tile with a finish-safe approach. Learn how to distinguish grime from buildup, choose gentle tools, and know…
Heaters
Pool Heater Sizing: How Many BTUs Does Your Pool Need?
Build a useful heater-sizing worksheet, compare capacity at real operating conditions and check installation fit before choosing a model.
Water Chemistry
Why Does Pool Water Burn Your Eyes and Smell Like Chlorine?
Find out why pool water stings your eyes, how chloramines and pH contribute, what to test, and when symptoms need…
Filters
When to Replace Pool Filter Sand, Cartridges, or DE Grids
Use damage, approved cleaning results and equipment-specific criteria to decide whether pool filter sand, cartridges or DE grids need replacement.
Pool Care
How to Calculate Pool Volume in Gallons or Litres
Pool volume = length × width × average depth × 7.5 for a rectangle, in US gallons. Formulas for round,…
Water Chemistry
How Much Salt to Add to a Saltwater Pool
Salt needed (lb) = gallons × ppm increase × 0.0000083454. 20,000 gallons from 500 to 3200 ppm takes about 451…
Filters
How Much Sand Does a Pool Filter Need?
Pool filter sand comes from the nameplate: Pentair Triton 175–925 lb, Hayward ProSeries 300–500 lb. Use No. 20 silica sand…
Hot Tub & Spa Care
How to Drain and Refill a Hot Tub
Cut the power, drain through the main valve (about 5–10 gallons a minute on Bullfrog), clean the shell and filters,…
Hot Tub & Spa Care
How to Shock a Hot Tub: Dose, Wait Time and Safety
Shock a hot tub with 1½ teaspoons of dichlor per 250 gallons (Hot Spring's rate), cover open 20 minutes, and…