The Crystal Quest bath filter is the Bath Ball, and it attaches to your tub faucet with no tools. We sell the Crystal Quest White Bath Ball and the chrome Bath Ball. Both finishes take the same replacement disk, part number CQE-RC-04052.

You attach the Bath Ball with one of its two handles, and the bath water then falls through the filter on its way into the tub. The disk inside is the only part you change. Each disk lasts 12 to 18 months, and we stock the replacement disk too.

Written by the Water Filters FAST filter experts. Reviewed by Phil McNamara, owner, Water Filters FAST. Updated October 2026.

How the Crystal Quest bath filter attaches to your tub faucet

Start at the tub faucet, because the Bath Ball attaches to it with a handle. Each Bath Ball comes with a standard handle and a flexible handle, and you use the one that suits the shape of your faucet. Keep the other handle in the box, and you have it on hand if you put in a new faucet later.

Attach the Bath Ball with the handle you picked. Then open the tap a little. All of the water should fall through the Bath Ball before it reaches the tub. If part of the stream misses the filter, attach the Bath Ball again with the other handle. Test the stream once more before you fill a bath.

The Bath Ball measures 5 by 5 inches and weighs 2 lbs. Before you order, measure from the bottom of the spout down to the tub floor. That gap needs to be more than 5 inches, because the drop-down Bath Ball hangs below the spout.

The drop-down design of the Bath Ball leaves room for a large amount of filter media inside it. That media gives the water more contact time on its way into the tub.

Pick white or chrome to match your bathroom

We sell the Bath Ball in a white finish and in a chrome finish. The two have the same size and the same weight. A chrome Bath Ball suits a chrome faucet, because the filter then matches the metal above it. The white Bath Ball suits a white tub and light tile.

Look at the faucet and the tile around it before you pick, because the Bath Ball stays in plain view under the spout. Each finish has its own part number, and you order the finish by that number.

If you already own a Bath Ball, check the part number on the old disk before you order. The label on the old part overrules any table in this post. Call 855-789-FAST if you want a filter expert to check that number with you.

You can see all three products side by side in our bath water filters collection, and each product page shows the live price. Order a spare disk with the Bath Ball, and you have the spare ready when the first disk is due.

Run the tap at 4 to 5 gallons per minute

The recommended flow rate through the Bath Ball is 4 to 5 gallons per minute. At 5 gallons per minute, your tap fills a 5 gallon bucket in one minute. At 4 gallons per minute, the same bucket takes 75 seconds to fill.

You can time your tap with a bucket and a watch before the Bath Ball arrives. Set the bucket in the tub under the spout. Start the watch at the moment you open the tap to your usual bath setting. Stop the watch when the bucket is full. The test takes about two minutes, and you only need to do it once.

If the bucket fills in well under a minute, the flow is above 5 gallons per minute. Turn the tap down a little. Then time the bucket again. If the bucket takes much longer than 75 seconds, the flow is under 4 gallons per minute, and you can open the tap further. Mark the right setting with a small piece of tape beside the tap, and you can go straight to it at every bath.

The operating pressure for the Bath Ball is 30 to 60 psi, and the operating temperature is 40 to 100 degrees F. The top of that range matters most in a bath, because part of the water comes from the hot side of the tap. If you like a hot bath, check the stream with a bath thermometer. Add cold water until the stream is at 100 degrees F or less.

What is inside the Bath Ball

The Bath Ball is a plastic housing with a disk inside, and the disk contains three kinds of filter media.

• A housing of BPA free ABS plastic
• Carbon GAC spheres
• Redox alloy spheres of the ERA 6500 and ERA 9500 types
• Chlorine removal spheres

As the tub fills, the water passes through each stage of ERA 6500 and ERA 9500. Crystal Quest says the Bath Ball reduces chlorine and chloramines, and you can read that claim on the Crystal Quest Bath Ball filter page. The Bath Ball is made in the USA.

When you change the disk, all of that media changes with it.

How to set up and care for your Crystal Quest bath filter

1. Pick the handle that suits your tub faucet, standard or flexible.
2. Attach the Bath Ball to the faucet so the stream falls through the filter.
3. Set the tap to a flow of 4 to 5 gallons per minute.
4. Write down the start date in a place you see often.
5. Turn the disk over from time to time, as Crystal Quest advises.
6. Order the CQE-RC-04052 disk when the old disk is 12 to 18 months old.
7. Drop the new disk into the Bath Ball you already own.

Turning the disk over spreads the water across all of the media, and it keeps the water from cutting one channel through the disk. Crystal Quest says on its Bath Ball replacement page that reversing the disk "extends the useful life of the disk".

Pick a place for the start date that you see often, such as the inside of a bathroom cabinet door. Turn the disk over now and then as Crystal Quest advises, and check the start date when you do. Set a phone reminder for 12 months after the start date too, and the reminder gives you the day to order the next disk.

When the disk is due for a change

The disk lasts 12 to 18 months. Crystal Quest says the exact time depends on your water and on how much you use the bath. A tub you fill every night uses up the disk sooner than a tub you fill once a week.

When the start date is 12 months old, order the next disk. Change the disk by the time it reaches 18 months. In Crystal Quest's words, "This genuine replacement cartridge drops into your existing Bath Ball in seconds."

If you lost track of the date, think back to the month you first attached the Bath Ball to your faucet. If you cannot recall the month, a new disk today gives you a clean start date. You can order the replacement disk from us.

Please allow a 2 to 3 day lead time before the Bath Ball or the disk leaves the warehouse. Fast shipping then brings your order to your door, and an order placed ahead of your date covers that wait.

Common questions about the Crystal Quest bath filter

How long does a Crystal Quest bath filter last?

Each disk in a Crystal Quest bath filter gives you 12 to 18 months of baths. Light use moves a disk toward 18 months, and heavy use moves it toward 12.

Does the Crystal Quest bath filter fit any tub faucet?

Each Bath Ball ships with a standard handle and a flexible handle, and it attaches to a tub faucet with no tools. If your faucet suits neither handle, call 855-789-FAST. Tell our filter experts the shape of your spout, and they will help you check the fit.

How do I change the Crystal Quest Bath Ball disk?

Take the old disk out of your Bath Ball filter. Drop a new CQE-RC-04052 replacement disk in its place. Write down the date of the change, because that date starts the count to your next disk.

Order your Crystal Quest Bath Ball and a spare disk

Order the Crystal Quest White Bath Ball or the Crystal Quest Chrome Bath Ball. Add a replacement disk to the same order for the first change. You get low prices and fast shipping, and we back your order with 30-day returns and our satisfaction guarantee.

Call 855-789-FAST and talk it through with the filter experts before you buy.