For treated water: 4 x 20" Jumbo Cartridges: First stage 1 Micron Meltblown, Second stage 5 Micron Carbon, Third stage 5 Micron Carbon, Final stage 1 Micron Meltblown
MatriKX Media material is from Coconut fibre, vastly superior to charcoal carbon, with superior life and reduced channeling.
Always relubricate the sump orings and the sump threads; this enables hand tightening to achieve a seal, which reduces flattening of the sump orings.
Sumps will gradually tighten due to the impact of pump pulsations.