Hot Spring Grandee
Quick answer
The Hot Spring Grandee holds about 455 gallons of water and measures 100 x 91 x 38 inches, seating up to 7. Full of water and people it weighs roughly 6,150 lb.
- Water volume455 gal
- TypeHard-shell
- Dimensions (in)100 x 91 x 38
- Seats7
- Water weight3,795 lb
- Empty weight1,060 lb
Chemical doses for about 455 gallons
Computed for this tub's water volume, so you can dose without doing the arithmetic. Amounts are ounces by weight.
| To do this | Chemical | Amount |
|---|---|---|
| Raise total alkalinity +10 ppm | sodium bicarbonate | 1.1 oz |
| Raise free chlorine +3 ppm | dichlor granules | 0.33 oz |
| Raise bromine +3 ppm | bromine granules | 0.30 oz |
| Chlorine shock (+10 ppm) | dichlor | 1.1 oz |
Open the dosing calculator for this tub
Add in small steps with the pump running, wait, then retest before adding more. Never mix chemicals together, and always follow your product label, which wins over any calculator.
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How much does a full Grandee weigh?
Empty, the Hot SpringGrandee weighs about 1,060 lb. Its 455 gallons of water add about 3,795 lb, and 7 bathers add roughly 1,295 lb more, for a loaded total near 6,150 lb. Make sure your deck or pad is rated for it. Work out any tub on the filled weight calculator.
Keep the water right
A 455 gallon tub doses in small amounts, so a kitchen scale and small additions beat eyeballing it. Test, balance alkalinity then pH then sanitizer, and use the dosing calculator sized for this tub. Start with test strips and a chemical kit.
Source
The 455 gallon figure is from the manufacturer's published specification: www.hotspring.com. Manufacturer site (current/NXT gen, 7 seats). Older Grandee was rated ~500 gal/6 person. Capacities vary with how high you fill and with seats and footwell; confirm against your own manual or a metered fill when precision matters.