Quick take
ASR211 is currently $33.99 with a 12-month interval; ASR212-400G is $69.99 with a two-year interval. On those list prices, the system annualizes to about $69 per year in core cartridges.
Stage 1: ASR211
ASR211 is the first-stage cartridge and is listed for 12 months.
Stage 2: ASR212-400G
ASR212-400G is the dedicated 400 GPD membrane cartridge for PD400 and is listed for two years.
Current pricing
Frizzlife currently lists ASR211 at $33.99 and ASR212-400G at $69.99.
Annualized cost
Using the nominal replacement schedule, those two cartridges work out to about $69 per year before promotions and tax.