Hot Tub Serum Willy | Oil-Absorbing Spa Sponge Flue & Chimney To ensure effective phosphate removal

To ensure effective phosphate removal

and coat your plumbing

Kills and prevents green

This concentrated clarifier solves that at the source: it gathers those microscopic particles together into clumps large enough for your filter to finally trap and remove

Hot Tub Serum Willy | Oil-Absorbing Spa Sponge Flue & Chimney To ensure effective phosphate removalWilly is part of Hot Tub Serum's line of oil absorbing sponges a simple, chemical free way to keep your spa water clean. It floats on the surface and quietly soaks up the body oils, lotions, makeup, and other contaminants bathers leave behind, capturing them before they clog your filter or form scum lines on the shell. Those oils are the root of some of the most common spa annoyances. Left in the water, they collect at the surface and along the