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Tell me what you see and any strip readings you have. I'll work out exact doses for your tub.
Your tub
Volume gallons
Sanitizer system
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Enter test results
Bromine 1–2 ppm
pH 7.4–7.6
Total alkalinity 120–150 ppm
Calcium hardness 150–250 ppm
Phosphate 0–125 ppb
TDS <1500
Water targets
Bromine
2–4
ppm
pH
7.4–7.6
Alkalinity
120–150
ppm
Hardness
100–200
ppm
Phosphate
0–125
ppb
TDS
<1500
ppm
Maintenance schedule
After each use
2 tbsp SpaGuard Brominating Concentrate
Jets on 15 min · cover off 30 min
Weekly
1 tbsp Water Clarifier + 3 tbsp Stain & Scale + ½ cup Enzyme
Test strips: bromine and pH. Adjust only if out of range.
Every 4 weeks
Replace FROG Serene bromine cartridge
Rinse filter with hose
Every 4 months
Replace FROG Serene mineral cartridge
Deep clean or replace filter · professional water test
Every 3–4 months
Full drain and refill
Ahh-Some pipe purge first · hose pre-filter on refill
Spa profile
Brand
Marquis Euphoria
Marquis Euphoria
Volume
400 US gallons
400 US gallons
System
FROG Serene in-line (bromine + mineral cartridges)
FROG Serene in-line (bromine + mineral cartridges)
Products
SpaGuard / BioGuard line
SpaGuard / BioGuard line
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