SPA & Hot Tub Filtration Retrofit | Bilanda Dual-Core Precision Filters

Commercial SPA, hot spring and bathhouse operators know the common pain points of old pool systems: traditional sand filters take up too much space in tiny equipment rooms, water stays cloudy even with multiple filters, heavy chemical use irritates guests, manual backwashing wastes water and labor, and tightening groundwater regulations make frequent water changes increasingly expensive.

We recently completed a 60m³ commercial hot tub retrofit without modifying any existing equipment room pipes, installing Bilanda dual-core multi-stage precision filters in available gaps: 2 precision filtration units + 2 adsorption units, solving all the client’s old system issues with fast, non-disruptive installation.

Core Benefits for Commercial SPA Operators

✅ Compact High-Flow Design, No Retrofit HeadachesAt the same footprint, a single precision filter delivers higher flow than multiple traditional sand filters. No need to expand equipment rooms or modify existing plumbing – units can be installed in available gaps, perfect for retrofitting older venues with limited equipment room space.

✅ High Precision Filtration, Eco-Friendly OperationUsing renewable elastic fiber filter media, water becomes crystal clear in a single pass, drastically reducing the need for chemical disinfectants for cleaner, more guest-friendly water and more environmentally friendly discharge. The innovative air scour design injects air during backwashing to deeply clean trapped debris from media gaps for more thorough cleaning; media lasts 5 years between changes, with water-saving air/water backwashing to cut water waste.

✅ Fully Automatic Operation, Cut Labor & Chemical CostsPLC remote control enables fully unattended operation, eliminating manual daily maintenance. The system eliminates cloudy, milky SPA water while drastically reducing labor and chemical costs for operators.

✅ Fast Return on InvestmentWhile upfront cost is slightly higher than traditional sand filters, savings on water, chemicals and labor deliver full return on investment within 1 year of operation, for lower long-term operating costs.

Precision Filtration is the Industry Trend

Tighter regulations on groundwater and hot spring water extraction are making frequent water changes unaffordable for operators, while traditional sand filters cannot deliver the required water clarity in tight spaces. Upgrading to precision filtration is now the standard for commercial SPA operations.

If you are struggling with limited equipment room space, cloudy SPA water, or high operating costs, we can design a custom retrofit solution for your venue – no existing pipe modification required, fast installation, and immediate improvement to your water quality and bottom line.