Replacement Filters for the HydroLogic Stealth RO300 (3-Stage) Reverse Osmosis System
HydroLogic · 3-Stage Reverse Osmosis
Replacement Filters for the HydroLogic Stealth RO300 (3-Stage) Reverse Osmosis System
Every filter your system needs — stage by stage — led by the IPW house-brand set that costs less than the OEM parts.
Also sold as: HydroLogic Stealth RO300 · HydroLogic RO300 · RO300 · Stealth RO300
Filters by stage
Replace stages individually below.
1
Sediment pre-filter
Pleated 5µm · 10" × 2.5"
SC-10PT-5 — pleated sediment 5µm — $5.99
Original part: Hydro-Logic HL22125 pleated sediment. Lower cost: IPW 5µm melt-blown — $3.50
2
Carbon block
10µm green coconut carbon block · 10" × 2.5"
Original part: Hydro-Logic HL22110 green coconut carbon
3
RO membrane
150 GPD thin-film composite · uses 2 (300 GPD total)
Original part: Hydro-Logic HL22121 (×2). Add 2 membranes to cart →
When to replace
🪣 Sediment: clean often, replace yearly🧱 Carbon: about every 1,250 gallons💧 RO membranes: 6 months to 2 years
✓ Fits the HydroLogic Stealth RO300 with 10" × 2.5" pre-filters and two 150 GPD membranes — not sure? call (714) 541-6600.
Not sure this is your system? Use the Isopure Water Filter Finder → Match by system name, by the part number printed on your current filter, or by snapping a photo.
HydroLogic Stealth RO300 filter FAQ
What filters does the HydroLogic Stealth RO300 use?
A 10" × 2.5" pleated sediment pre-filter (OEM HL22125), a 10" × 2.5" carbon block (OEM HL22110 green coconut) and two 150 GPD RO membranes (OEM HL22121).
How many membranes does the Stealth RO300 need?
Two. The RO300 runs two HL22121 membranes. The Stealth RO150 uses one of the same membrane. Replace both at the same time.
How often should I change the Stealth RO300 filters?
HydroLogic rates the green coconut carbon filter at about 1,250 gallons. Clean the pleated sediment filter often and replace it about once a year. Membranes last 6 months to 2 years, depending on your water.
Is there an upgraded carbon filter for the RO300?
Yes. HydroLogic offers KDF85/catalytic carbon (for iron, sulfur and well water) and ChloraShield (for chloramine) for the carbon stage. Call (714) 541-6600 and we will match the right one.
All replacement filters by system · HydroLogic Stealth RO150 · HydroLogic Stealth-RO 200 · HydroLogic Stealth RO100
Compatibility reference only. Photos of complete systems shown on this page are provided to help you identify your unit and confirm that our filters fit. All brand names, model numbers, and product images are the property of their respective owners; Isopure Water (IPW Industries Inc.) is not affiliated with, sponsored by, or endorsed by these manufacturers. We sell compatible replacement filters and parts — not the branded systems pictured, unless a system is separately listed for sale on our store.
