AFM® (Activated Filter Media)
Crystal-clear pool water with 30–50% less chemistry.
The technology explained.
Activated Filter Media (AFM) is an engineered glass-based filter medium that replaces silica sand in pressure-filter vessels. The grains carry a negative surface charge that bio-resists and helps adsorb fine colloids at lower head loss than sand, with a nominal filtration cutoff of 4–10 µm depending on grade.
- Filters to roughly 4–10 µm — substantially finer than silica sand (~25 µm).
- Reduces chlorine demand by 30–50% on most pool installations.
- Self-sterilises and inhibits bio-film formation on the medium itself.
- Lasts the life of the pressure vessel without recharging or replacement.
- Premium commercial pools, spas and wellness facilities.
- Pools targeting low free-chlorine residuals and minimal disinfection by-products.
- Sites where backwash water-loss must be minimised.
- Replacement of existing sand media without changing the pressure vessel.
- ×Not a disinfection step — chlorine, UV or ozone is still required for sanitation.
- ×Initial purchase cost is higher than sand — recovered over 3–5 years through chemistry savings.
- ×Performance still depends on correct backwash velocity and filtration rate.
- ×Not a fix for under-circulated or hydraulically-broken pools.
Where AFM® is used.
- Commercial swimming pools
- Hotel and lodge wellness pools
- Spa and hydrotherapy circuits
- Drinking-water polishing in some installations
How HidroVerse deploys AFM®.
We standardise on AFM on every commercial pool we sign. The chemistry savings, the lower chlorine residual and the absence of media-replacement cycles all pay back inside 36 months on most lodges and hotels we measure.
A typical AFM® treatment chain.
AFM is one stage in a managed pool. Circulation, chemistry and disinfection all live alongside it.
Pre-treatment
Skimmer baskets and hair-and-lint pots ahead of the pump to remove gross solids and fibres.
Core stage
Pressure-filter vessel charged with AFM at design backwash and filtration velocity, sized against the pool turnover.
Post-treatment
Disinfection (salt-chlorination, UV or ozone hybrid); ORP/pH feedback chemistry control; heater and balance dosing.
Waste handling
Backwash volumes routed to a discharge point with consent; AFM itself is not replaced — the vessel charge lasts its design life.
Buyer's guide.
The questions every commercial buyer should put on the table before signing for a water system. Can't see yours? Send us a brief — a HidroVerse specialist replies within one business day.
Yes — we keep a current reference list organised by application and scale. After a short qualifying call we release names, contacts and (with the host's permission) site-visit options. The conversation between two operations managers is the most honest reference we can offer; we do not gate-keep it.
We start with a SANAS-accredited feed-water panel, profile your demand against verified occupancy or production data (not brochure numbers), and specify against the worst-credible feed and peak demand — with disclosed margins. If a simpler technology will hit the brief, we'll specify the simpler technology and tell you why. We do not earn more by over-spending you; we earn more by you renewing service contracts year after year.
PFD, P&IDs, sizing calculations against verified influent data, equipment schedules with serial numbers, control philosophy, pre-treatment justification, waste-handling and regulatory compliance trail. Audit-ready by an external ECSA-registered engineer is the standard we design to — not a brochure pack with marketing fluff.
Pre-treatment is technology-specific (sediment, hardness, chlorine, biological load) and non-optional. Skipping it is the single largest cause of premature failure on every membrane, media bed and disinfection stage. Watch for suppliers quoting only the core stage — they are selling you a 12-month problem.
Every consumable and major component has a quantified replacement trigger (differential pressure, flow drop, UV intensity drop, salt-passage drift). Replacement schedules and trigger limits are written into the HidroVerse Care contract — visible, auditable and triggered on monitoring data, not guesswork.
Critical components are specified with duty/standby and automatic fail-over so a single failure does not stop supply. Our SLA on critical lines is 4 hours on site; the median lived response over the last 14 months is 2 hours 40 minutes. Telemetry triggers tickets before the operator notices — most failures are flagged, not phoned in.
Continuous telemetry on flow, pressure, conductivity, turbidity and on-skid water quality. Monthly SANAS-accredited compliance sampling is included on HidroVerse Care — not invoiced piecemeal. The audit pack builds itself monthly so when DWS or your insurer arrives, the file is ready in 30 minutes.
Potable applications: SANS 241:2015 (mandatory under the Water Services Act 108 of 1997), the National Water Act 36 of 1998 for abstraction and discharge, NSF/ANSI component certification, WHO Guidelines for design margin. Wastewater: the relevant DWS discharge authorisation under General Authorisation 665 or a site-specific Water Use Licence. We sign off against the legal floor and design to a margin above it.
Survey 1–2 weeks, design 2–4 weeks, install 4–10 weeks, commissioning and proof of compliance 1–2 weeks — typically 8–14 weeks for a lodge or estate, longer for mining and municipal. Delays come from civil works, third-party council approvals and architectural changes; the engineered scope rarely slips.
Survey, lab analysis, design pack, equipment, install, commissioning, operator training, the first year of monthly compliance sampling and the agreed scope of HidroVerse Care. Civils, electrical reticulation, third-party council fees and any architectural integration work are quoted separately and scheduled into the contract. If your quote has 'allowances' and 'provisional sums' across the page, you are buying a future invoice.