Product Information
Description
Pool Frog XL Pro In-Ground In-Line Mineral System
Fresh mineral water. Half the chlorine.
The King Technology Pool Frog XL Pro In-Ground In-Line System (PST-01015450, MPN 01-01-5450) is a two-chamber water treatment center that plumbs directly into your return line and does the sanitizing work for you. One Cycler holds a prefilled Mineral Reservoir that releases silver and copper into the water, while the second Cycler meters a 540C Chlorine Pac at a precise low dose, so a pool up to 40,000 gallons stays clear on up to 50% less chlorine. You get soft, balanced water and a maintenance routine that comes down to two easy cartridge swaps a season.
Minerals Do the Heavy Lifting
The prefilled Mineral Reservoir releases a patented blend of silver and copper into your water, where silver attacks bacteria and copper keeps algae in check. That mineral base lets you run free chlorine at just 0.5 to 1.0 ppm instead of the usual levels, which is how the XL Pro cuts chlorine use by up to 50%. The result is water that feels softer on skin and easier on eyes, without the heavy chlorine smell.
A Precise Dose Every Cycle
The second Cycler holds a prefilled 540C Chlorine Pac, 6.16 lb of stabilized trichlor, and doses it slowly as water flows through. Because the feed is metered instead of dumped, one Pac keeps the pool sanitized for roughly 2 to 4 weeks before it needs a swap. No measuring, no daily tablet juggling, no chlorine spikes after a rainstorm, just a steady low level your minerals can back up.
Two Swaps and You're Done
Season maintenance is about as simple as pool care gets. Drop in a fresh Mineral Reservoir once every 6 months or one pool season, then replace the 540C Chlorine Pac every few weeks when it empties. Each swap takes under five minutes, turn off the pump, unscrew the Cycler lid, pull the spent cartridge, drop in the new one, reseat and restart. That is the whole job.
Who It's For
Large In-Ground Pools
Sized for in-ground pools up to 40,000 gallons, covering everything from a standard backyard rectangle to a big freeform build.
Chlorine-Sensitive Swimmers
Families who react to heavy chlorine get soft, low-odor mineral water while staying fully EPA-sanitized.
Hands-Off Owners
If you would rather swim than test and dose every day, the XL Pro turns weekly pool care into a couple of cartridge swaps a season.
In-Line Return Plumbing
Plumbs directly into 2-inch return-side pipe, so it fits standard in-ground equipment pads without a separate feeder loop.
Why PST Customers Pick This
Softer, Balanced Water
The mineral blend helps hold pH steady and leaves water noticeably softer and clearer than chlorine alone can manage.
Kills Bacteria, Controls Algae
Silver targets bacteria while copper suppresses algae, giving you two lines of defense working around the clock.
In-Line Installation
Two Cyclers install right in your 2-inch return plumbing, keeping the equipment pad clean with no off-line bypass rig.
Prefilled Cartridges
Both the Mineral Reservoir and 540C Chlorine Pac come prefilled, so refills are drop-in with no loose chemicals to handle.
No Chlorine Spikes
Metered feeding holds a steady 0.5 to 1.0 ppm, so you avoid the over-chlorinated swings that come with hand-dosing tablets.
10-Year Cycler Warranty
King Technology backs the Cycler with a 10-year limited warranty, plus a 90-day algae protection guarantee on the system.
Chemical Handling
The 540C Chlorine Pac is stabilized trichlor. Never mix it with cal-hypo, other chlorine types, or any other chemical, combining chlorine products can trigger a violent reaction and release toxic chlorine gas. Only load a Pac into a dry Cycler chamber, keep the pump running per the manual so chlorine cannot concentrate, and store spare Pacs sealed in a cool, dry place away from other pool chemicals.
Full Specifications
Frequently Asked Questions
How is the XL Pro different from the smaller in-ground Pool Frog systems?
The XL Pro is the large-capacity in-ground system, rated for pools up to 40,000 gallons with 2-inch in-line ports and two Cyclers, one for minerals and one for the 540C Chlorine Pac. Smaller in-ground Frog systems cover lower gallon ranges and use different Chlorine Pacs. Match the system to your pool size, and use the 540C Pac and Series 5400 Mineral Reservoir (01-12-5462) called out here so the fit and dosing are correct.
What pool size does the Pool Frog XL Pro handle?
It is engineered for in-ground pools up to 40,000 gallons. If your pool is larger than that, a single XL Pro will not keep up and you should look at a higher-capacity or supplemental sanitizing setup. For pools in the 10,000 to 40,000 gallon range, this is the right in-ground Frog system.
How much chlorine does it actually use?
Because the Mineral Reservoir handles a big share of the sanitizing, you run free chlorine at only 0.5 to 1.0 ppm, up to 50% less than a chlorine-only pool. That is still a fully EPA-compliant sanitized pool, just with less chlorine, less odor, and softer-feeling water.
How often do I replace the cartridges?
Swap the Mineral Reservoir every 6 months or once per pool season, whichever comes first. Replace the 540C Chlorine Pac roughly every 2 to 4 weeks when it runs empty, depending on pool size, bather load, and water temperature. Both are prefilled drop-in cartridges.
Can I install the XL Pro myself?
Many in-ground pool owners install it themselves. The two Cyclers plumb in-line on the 2-inch return side after the filter and heater, so you cut in, glue the fittings, and set the Cyclers upright for cartridge access. If you are not comfortable cutting and solvent-welding PVC on a pressurized return line, have a pool professional set the plumbing and then handle cartridge swaps yourself.
Do I still need to test and balance my water?
Yes. The XL Pro handles day-to-day sanitizing, but you should still check free chlorine, pH, and total alkalinity regularly and keep them in range. The minerals help hold pH steady, but proper balance protects your surfaces and equipment and keeps the chlorine working efficiently.
What replacement parts does this system use?
Keep two cartridges on hand, the Series 5400 Mineral Reservoir (01-12-5462) and the 540C Chlorine Pac (01-03-5613). Both are prefilled and specific to the 5400-series XL Pro Cyclers, so ordering by these part numbers ensures a correct fit and dose.
Order the Pool Frog XL Pro From PST
Authorized King Technology dealer. Backed by PST Pool Supplies and our service team, with help on the line before and after your install.
Additional Info
| Category | Pool Products Pool Accessories Chemical Feeders |
| SKU | PST-01015450 |
| MPN | 01-01-5450 |
| Manufacturer | King Technology |
| Weight | 21.0 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..
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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!
