Bullfrog M9
Quick answer
The Bullfrog M9 holds about 566 gallons of water and measures 94 x 110 x 38 inches, seating up to 10. Full of water and people it weighs roughly 7,745 lb.
- Water volume566 gal
- TypeHard-shell
- Dimensions (in)94 x 110 x 38
- Seats10
- Water weight4,720 lb
- Empty weight1,175 lb
Chemical doses for about 566 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 | 1.4 oz |
| Raise free chlorine +3 ppm | dichlor granules | 0.40 oz |
| Raise bromine +3 ppm | bromine granules | 0.38 oz |
| Chlorine shock (+10 ppm) | dichlor | 1.3 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.
As an Amazon Associate this site earns from qualifying purchases. Shopping links are affiliate links and cost you nothing extra.
How much does a full M9 weigh?
Empty, the BullfrogM9 weighs about 1,175 lb. Its 566 gallons of water add about 4,720 lb, and 10 bathers add roughly 1,850 lb more, for a loaded total near 7,745 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 566 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 566 gallon figure is from a major retailer or authorized dealer listing: patiosplash.com. M Series flagship. 566 gal. Up to 10 seats. Authorized dealer listing. Capacities vary with how high you fill and with seats and footwell; confirm against your own manual or a metered fill when precision matters.