The filters below are the same for the Monarch P4 & Onga Pantera PCF11
P4 / Onga Pantera PCFII 75 Sq Ft Cartridge Element
$86.36 ($66.47 ) AUD
P4 / Onga Pantera PCFII 100 Sq Ft Cartridge Element
$95.45 ($73.47 ) AUD
P4 / Onga Pantera PCFII 150 Sq Ft Cartridge Element
$101.82 ($78.37 ) AUD
P4 / Onga Pantera PCFII 200 Sq Ft Cartridge element (2 x 100 sq Ft)
$159.09 ($122.45 ) AUD
Saltmate RP20 Self Clean Chlorinator
$845.45