Get rid of toilet bowl ring permanently. Flush Frog cleans your toilet bowl with every flush, helps prevent hard-water stains, and routes cleaner to the bowl instead of soaking tank parts.
Up to 1 year per tablet · Holds up to 5 · Up to ~5 years between full reloads. Flush frequency and water conditions matter.
$8.75 per toilet · Free US shipping on 4 Pack · 30-day no-fit · Tablet guide
Five-tablet capacity. Cleaner goes to the bowl, not the tank reservoir.
$34.99 · Only $8.75 per toilet · Free US shipping
Four dispensers. Save $24.97 versus four 1-Packs. Tablet not included. 30-day refund including no-fit.
Try one toilet. Same dispenser. Tablet not included. 30-day refund including no-fit. Shipping calculated at checkout.
Load one 3-inch bromine (BCDMH) tablet you buy separately. Replace it when it's gone. Flush Frog holds up to five standard 3-inch BCDMH tablets. Each tablet can last up to one year depending on flush frequency and water conditions, providing up to approximately five years between full reloads. We do not sell tablets. Which cleaning tablets work with Flush Frog?
Load. Clip on overflow. Connect the refill tube into Flush Frog. About 3 minutes. No tools.
Load one 3-inch bromine (BCDMH) tablet you buy separately. Details below.
Clip the dispenser on the overflow pipe inside the tank.
Move the refill tube from the fill valve into Flush Frog. Close the lid and flush.
If bowl maintenance isn’t easier, you get a purchase-price refund.
A waterline ring is minerals plus a thin film. Scrubbing takes off what’s there. The next days of ordinary flushes start it again. Tank tablets dissolve directly in the reservoir, leaving tank components exposed to treated water between flushes. The ring you see is in the bowl.
Keep the bowl clean and help prevent the toilet bowl ring from coming back.
Flush Frog clips on the overflow pipe. A refill tube from the fill valve runs through the dispenser. On each flush, that water picks up cleaner and carries it into the bowl, where it stays and cleans. Flush Frog instead treats the smaller refill stream already headed toward the bowl.
Diagram. Clip on the overflow. Refill water is dosed into the bowl, not left soaking the tank.
Flush Frog works on a similar principle to overflow-tube systems like the Fluidmaster Flush ’n Sparkle, with key differences in how it handles tablets and water routing. Those differences are designed to extend tablet lifetime versus cartridge-style competitors — which means fewer refill trips and cleaner bowls between changes.
That’s the vertical tube in the tank (also called the overfill pipe). Fits most standard 2-piece gravity toilets. Often no: pressure-assist, some one-piece, RV, some compact Toto/Kohler layouts. If it doesn’t clip, the 30-day refund covers no-fit. Don’t force tank parts.
Labeled diagram. This is the overflow pipe (also called the overfill pipe).
The clip-on dispenser. Clip and refill-tube path are built in. Device only — no tablet, no tools. 1 Pack = one dispenser. 4 Pack = four. Load one 3-inch bromine (BCDMH) tablet you buy separately — which tablets work.
The Flush Frog dispenser. Tablet you buy separately.
Lift the lid. Do you see an overflow pipe? Fits most standard 2-piece gravity toilets. Often no: pressure-assist, some one-piece, RV, some compact Toto/Kohler layouts. If it doesn’t clip, 30-day refund covers no-fit. Don’t force tank parts.
Scrub what’s already there once. Then every flush fights it coming back. Prevention, not magic erase.
Flush Frog holds up to five standard 3-inch bromine (BCDMH) tablets. Load one tablet you buy separately; replace it when it's gone. Each tablet can last up to one year depending on flush frequency and water conditions, providing up to approximately five years between full reloads. We do not sell tablets. Which cleaning tablets work with Flush Frog?
About three minutes. No tools. Load, clip on the overflow pipe, move the refill tube from the fill valve into Flush Frog, lid on and flush.
30 days, including no-fit. If bowl maintenance isn’t easier, you get the purchase price back. Return shipping is not free.
Free US shipping on the 4 Pack. 1 Pack: shipping calculated at checkout. US only. Orders leave in 1–2 business days.
I invented Flush Frog after looking at how ordinary drop-in toilet cleaners work and realizing the cleaner was sitting in the wrong place. The ring you’re trying to prevent is in the bowl, but a tank tablet spends all day dissolved around the flapper and seals.
Solve the problem first
Choose the symptom that sounds familiar. Each guide explains what it may mean, what to check safely and when to call a plumber.
Toilet troubleshooting guide
Start with citric acid for an ordinary mineral ring, use vinegar only with an emptied bowl and a long soak, and save CLR for stubborn rings, following its...
Read the guideToilet troubleshooting guide
Overflow-pipe cleaners are designed for ordinary gravity-flush toilets with an open overflow pipe, a fill valve, and a refill tube; pressure-assist, in-wall, tankless, RV, and some dual-flush or...
Read the guideToilet troubleshooting guide
White vinegar slowly dissolves thin, fresh mineral rings when it sits undiluted on the ring with the water lowered; it does little on thick old scale, rust, or...
Read the guideToilet troubleshooting guide
Wet pumice with light pressure safely grinds raised hard-water scale off intact glazed porcelain; it scratches when dry, pressed hard, or used on seats, chrome, enamel, coated or...
Read the guideToilet troubleshooting guide
No toilet cleaner is pet- or kid-safe; the real risk is the concentrated tablet, so keep the lid down, store tablets high, and call poison control or your...
Read the guideToilet troubleshooting guide
Vacation-home toilets grow rings because water sits and evaporates between visits; clean once, then leave overflow-pipe dosing for the flushes that do happen — 4-pack for multi-bath homes.
Read the guideWhole-Home 4 Pack — $34.99. $8.75 per toilet. 30-day guarantee.
Flush Frog Toilet Guide
Practical answers for toilet problems, maintenance, cleaning, sizing, and repairs.
October 27, 2026
Start with citric acid for an ordinary mineral ring, use vinegar only with an emptied bowl and a long soak, and save CLR for stubborn rings, follow...
Read guide
October 13, 2026
Overflow-pipe cleaners are designed for ordinary gravity-flush toilets with an open overflow pipe, a fill valve, and a refill tube; pressure-assist...
Read guide
October 6, 2026
White vinegar slowly dissolves thin, fresh mineral rings when it sits undiluted on the ring with the water lowered; it does little on thick old sca...
Read guide
October 5, 2026
Wet pumice with light pressure safely grinds raised hard-water scale off intact glazed porcelain; it scratches when dry, pressed hard, or used on s...
Read guide
October 4, 2026
No toilet cleaner is pet- or kid-safe; the real risk is the concentrated tablet, so keep the lid down, store tablets high, and call poison control ...
Read guide
October 1, 2026
Vacation-home toilets grow rings because water sits and evaporates between visits; clean once, then leave overflow-pipe dosing for the flushes that...
Read guide
