Product Information
Description
King Technology Pool Frog 5400 Off-Line In-Ground Cycler with Mineral Reservoir
Fresh Mineral Water with up to 50% less chlorine.
The King Technology Pool Frog 5400 Off-Line In-Ground Cycler (PST-01015490, MPN 01-01-5490) is the complete water treatment center for in-ground pools up to 40,000 gallons, and it ships with the Cycler body, a fresh Mineral Reservoir, the diverter, and the install kit. It pairs patented sanitizing minerals with a low, precise dose of chlorine to make Fresh Mineral Water, the kind that looks clearer and feels softer while cutting your chlorine use by up to 50%. This is the off-line version, so it taps into a bypass loop on your return line instead of threading directly inline, which makes it the right choice when your plumbing does not leave room for an inline cycler.
Fresh Mineral Water
Water flows up through the Mineral Reservoir seated inside the Cycler, where patented sanitizing minerals go to work destroying bacteria all season long. Those same minerals make chlorine last roughly twice as long, so the pool holds a clean, balanced feel on a fraction of the chemical load. The result is water King Technology calls Fresh Mineral Water, clearer to look at, softer on skin and eyes, and easier to keep that way week to week.
Precise Low-Dose Chlorine
A front-mounted Control Dial lets you fine-tune how much water passes through the Cycler, which meters the chlorine output to the small amount your pool actually needs. The erosion-feed design holds a steady low level, with only about 0.5 ppm of free chlorine required to stay sanitary. That is how the 5400 cuts chlorine use by up to 50% against the EPA minimum for a stabilized pool, without the sharp smell and harsh feel of a heavily chlorinated pool.
Built for Off-Line Plumbing
The off-line 5400 installs on a bypass loop using the included diverter, so it works even when there is no straight run of return pipe to accept an inline body. A small amount of return flow is diverted up through the Cycler and back into the line, no pump upgrade and no electricity needed. It sits after your pump and filter, which means you can add it to an existing in-ground pool as a weekend project rather than a re-plumb.
Who It's For
In-Ground Pools
Sized for in-ground pools up to 40,000 gallons that run a standard pump and filter, from small backyard pools to large residential builds.
Tight Equipment Pads
The off-line design taps a bypass loop, so it fits equipment pads that have no straight length of return pipe for an inline cycler body.
Chlorine-Sensitive Swimmers
Families who want softer, lower-odor water and less chlorine on skin, hair, and swimsuits without giving up reliable sanitizing.
Low-Maintenance Owners
Owners who would rather set a dial and swap a reservoir seasonally than test, dose, and shock a high-chlorine pool by hand.
Why PST Customers Pick This
Mineral Plus Chlorine
Combines patented sanitizing minerals with a low dose of chlorine, the two-part system King Technology built the Pool Frog line around.
Complete Cycler Kit
Includes the Cycler body, a fresh Mineral Reservoir, the diverter, and the install kit, so the treatment center is ready to plumb in.
No Extra Pump or Power
Runs off your existing circulation. There is no separate pump to add and no electrical connection to wire in.
Dial-In Output
The Control Dial adjusts flow through the Cycler so you can tune chlorine output to your pool size and bather load.
Softer, Clearer Water
Fresh Mineral Water looks clearer and feels softer than a conventional chlorinated pool, with noticeably less chlorine odor.
Seasonal Reservoir Swap
One Mineral Reservoir lasts up to six months or a full pool season, so mineral upkeep is a single scheduled change.
Chemical Handling Notice
This system feeds pool chlorine through the Bac Pac. Do not install the Cycler in a copper return line, chemical corrosion from the chlorine can attack copper and lead to pipe failure. Never mix chlorine products with other chemicals, and keep the minerals and any chlorine cartridge in their original containers, away from children. Off-line installation requires drilling into the return line for the diverter, so shut down and drain the plumbing first and use pipe thread sealant, not tape, on in-ground ports to prevent leaks.
Full Specifications
Frequently Asked Questions
What is the difference between the off-line 5400 and the in-line 5400?
Both treat the same size pool with the same minerals and low-dose chlorine, the difference is how they plumb in. The in-line cycler threads directly into a straight run of your return line. This off-line cycler (MPN 01-01-5490) uses the included diverter to tap a bypass loop, so it is the one to choose when your equipment pad has no straight section of pipe to accept an inline body.
What size pool does the Pool Frog 5400 handle?
The 5400 series is rated for in-ground pools up to 40,000 gallons. If your pool is larger, you will need to look at a bigger Pool Frog platform. If it is much smaller, the 5400 still works, you simply run a lower Control Dial setting.
Does this come with everything I need to start?
This package includes the Cycler, a fresh Mineral Reservoir, the diverter, and the install kit. The chlorine Bac Pac and Frog BAM algaecide are consumables that are purchased separately, since they are swapped on their own schedule as the pool runs.
How often do I replace the Mineral Reservoir?
Plan on one Mineral Reservoir per season. It lasts up to six months or one pool season, whichever comes first, then you drop in a fresh reservoir. The chlorine cartridge is changed far more often, typically every one to three weeks depending on pool size and how hard the pool is used.
How much less chlorine will I actually use?
King Technology rates the complete Pool Frog system at up to 50% less chlorine than the EPA minimum for a stabilized pool, and the minerals help chlorine last about twice as long. In practice the system holds roughly 0.5 ppm of free chlorine, which is why the water smells and feels milder than a conventional chlorinated pool.
Can I install this myself?
Many in-ground owners install the off-line 5400 themselves as a weekend job, since it mounts after the pump and filter and needs no electrical work. Off-line installs do require drilling into the return line for the diverter, so you shut down and drain the plumbing, drill the tap, and seal the in-ground ports with pipe thread sealant. If you are not comfortable cutting into your return plumbing, have a pool professional set it up.
Will it work with a copper return line?
No. Do not install a Pool Frog on copper pipe when using the chlorine Bac Pac. The chlorine can chemically corrode copper and cause pipe failure over time. If your returns are copper, convert to PVC at the equipment pad before adding the Cycler.
Order the Pool Frog 5400 Off-Line Cycler From PST
Authorized King Technology dealer. Backed by PST Pool Supplies' service team, with help on the line before and after your install.
Additional Info
| Category | Pool Products Pool Accessories Chemical Feeders |
| SKU | PST-01015490 |
| MPN | 01-01-5490 |
| Manufacturer | King Technology |
| Weight | 4.5 lb |
Let customers speak for us
The only place I could find with the part I needed. Delivery was fast and the price was great. Best pool supply store on the web.
Part was easy to find and arrived a couple of days earlier than originally scheduled.
The ceramic spindle in the center of the original impellor broke. Replacement with this part was super easy and pump performs like new.
Ease of purchase replacement part took care of the problem
Received the correct replacement part. Not a real tough job. Part works great!
Better than the PA version at fraction of the cost.
Just what I needed for my syllent pump that comes with no Jacuzzi pump coupler. Do need a 1 1/2x1 1/4 reducer but everything will work out just fine..
This product seems to work great so far! I’m only two days in but the leak around my steps seems to have been completely stopped after applying this
All went well. Fast shipping AAAAAAAAAAA++++++++++++
Our pool and spa are over 25 yrs old. When the spa air button stopped working, we found that it was no longer avaliable. We did some online searching and found that this was a good replacement option and found it on the PST Pool Supplies website. We ordered it and once it arrived, we were very happy that we were able to install it and it worked fine.
Exact replacement Weir door that fit perfectly! Solved the problem of my old worn out doors!
