The Bullfrog Spas M8 takes the Bullfrog Spas Simplicity flat filter, 6-pack (235 x 265 mm) (part FILTER-BF-SIMPL-6PK) as its cartridge; replace it every 3 months; Australian sellers list it from A$33.17 each as of 30 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your spa
Bullfrog Spas M8
Spa
Confirmed against Bullfrog Spas's listConfirmed against Bullfrog Spas's own compatibility list
Not yours? ChangeSave it · remind me every 3 months
Takes the FILTER-BF-SIMPL-6PK cartridge
Simplicity flat filter, 6-pack (235 x 265 mm) · replace every 3 months · check the code on your old part before ordering.
Takes the flat Simplicity filter. The 6-pack is six filters.
Your spa
Spa
Confirmed against Bullfrog Spas's listConfirmed against Bullfrog Spas's own compatibility list
Takes the FILTER-BF-SIMPL-6PK
Cartridge · every 3 months · check the code on your old part.
Takes the flat Simplicity filter. The 6-pack is six filters.
Other Bullfrog Spas that take the FILTER-BF-SIMPL-6PK
GenuineGenuine Bullfrog Spas
$33.17 each
6-pack $199.00
Spa Supplies · 30 OctLowest genuine · Spa Supplies · checked 30 Oct
CompatibleCompatible option
See seller
No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by Bullfrog Spas. Compatible: another brand.Genuine is made by Bullfrog Spas. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest price · $33.17 each · 6-pack $199.00
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AUD, before delivery. Each price shows when it was checked.
Opens Spa Supplies in a new tab. Their page is the source of truth for price, delivery and returns.
Not due yet?
Get a nudge when your cartridge is due — it's every 3 months. One email two weeks before, no newsletter. Manage or stop it anytime.
How to change the cartridge in your Bullfrog Spas M8
Watch the guide or follow the steps.
- 1Switch the spa off at the isolating switch or main breaker (Bullfrog: turn off main power to the spa).
- 2A Series: remove the JetPak in front of the Simplicity filter housing, the first JetPak to the right of the main control. M Series and Swim Series: see your owner's manual for where the filter is.
- 3Reach into the jet pod, grasp the handle of the Simplicity filter holder, push it toward the inside of the spa and lift it out.
- 4Open the holder, lift the old filter out by its loop and fit a new one with the glue lines showing: slide one end under the retention slots and press the looped end down.
- 5Snap the holder back into the housing with a back-and-down motion, refit the JetPak and turn the power back on.
Every number this part goes by
- Retail name:
- Bullfrog Simplicity filter
- Retail name:
- Bullfrog Simplicity flat filter
- Retail name:
- FILTER-BF-SIMPL-6PK
Sellers list any of these; they are the same part.
About your Bullfrog Spas M8
Bullfrog Spas — Bullfrog M Series. Its cartridge is the Simplicity flat filter, 6-pack (235 x 265 mm), part FILTER-BF-SIMPL-6PK, changed every 3 months.
Where the model number is: The model (A7L, M8) is on your purchase papers, and the serial number sticker is on the equipment compartment. A Series spas from 2023 have the flat Simplicity filter; older ones take round cartridges.
Fits these 13 Bullfrog Spas models
Common questions
- Which cartridge fits the Bullfrog Spas M8?
- The Bullfrog Spas M8 takes the Bullfrog Spas Simplicity flat filter, 6-pack (235 x 265 mm) (part FILTER-BF-SIMPL-6PK). Takes the flat Simplicity filter. The 6-pack is six filters.
- How often should I replace the cartridge in my Bullfrog Spas M8?
- Every 3 months, or sooner if the cartridge light comes on.
- Where can I buy the FILTER-BF-SIMPL-6PK in Australia?
- We track 1 Australian seller for the FILTER-BF-SIMPL-6PK; the lowest listed price when we last checked was A$33.17 at Spa Supplies. Prices are re-checked daily and dated on this page.
- How do I fit the FILTER-BF-SIMPL-6PK in a Bullfrog Spas M8?
- 5 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- A clogged cartridge slows the flow and the pump works harder, and a torn one lets dirt back into the water, so the pool or spa clouds.
- How do I reset the cartridge light?
- The A Series status light gives a slow fading flash when a filter needs replacing; mark the reminder as done on the control screen after fitting the new filter and the light returns to solid white (Bullfrog A Series manual).
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