King Technology Pool Frog Model 5400 In-Line System, Up to 40,000 Gallons, 01-01-5480

The Pool Frog Model 5400 is King Technology in-line mineral system for in ground pools up to 40,000 gallons. It installs into the return line and runs without electricity and without additional plumbing.

How the system works

The Cycler is the water treatment center of the system and controls how much water passes through it. A patented control dial on the front sets that flow. Water is carried upward into the mineral reservoir and the chlorine Bac Pac at the same time, so minerals and a low level of chlorine work together rather than relying on chlorine alone.

Minerals and chlorine

The mineral reservoir holds an EPA registered mineral formula that continuously replenishes, guarding against bacteria and acting as a neutralizer that helps hold pH. One reservoir is stated to last a full season or up to six months, and year round pools use two. The chlorine Bac Pac, which is not included with this system, seats into the reservoir and releases chlorine at a precise low level for one to three weeks at a time. King Technology states the complete system can reduce chlorine use by up to 50 percent compared with standard water treatment programs.

Set it and leave it

Once the dial is set for your pool, the erosion design keeps dispensing at that low level without further adjustment. There is no extra plumbing to add and no power to run, which is much of the appeal for owners who want fewer things at the equipment pad.