I have a custom built in-ground 1200 gallon bromine spa, which really looks more like a small plunge pool (photo below). It is freeform shape approximately 7 ft x 10 ft and 3.5 ft deep and has a Pebbletec plaster finish and a waterfall. Equipment specs are as follows:
8 returns (7 jets/1 waterfall), 1 skimmer, dual main drains
1.5 Hp Pentair WhisperFlo Pump
1.5 Hp Air Silencer Blower
Jandy 460 sq ft Cartridge Filter
Laars LX250 Gas-fired Pool and Spa Heater
I follow the 3-step bromine process (bromide salt reserve, Clorox oxidiser, 1" bromine tabs in floater) and am a huge fan of the BBB process.
The general recommendation for spas seems to be to drain and refill every 3 months, but I suspect that is really referring to traditional under 500 gallon fiberglass spas, not an in-ground spa that is more like a pool. My question, therefore, is how often should I completely drain and refill a spa-ool such as mine?
Thanks so much.
Sandi in Dallas