Merkia 7.5” Floating Chlorine Dispenser Review
- AboveGroundSplash
- Jun 1
- 9 min read
The Merkia 7.5” Floating Chlorine Dispenser is a simple pool floater designed to hold chlorine tablets and slowly release sanitizer into your pool water. It is best suited for above-ground pool owners who want an affordable way to maintain chlorine between regular water testing, shocking, and filter maintenance.
This is not a replacement for testing your pool water, balancing your chemicals, or shocking the pool when needed. Its job is much simpler: keep a steady chlorine supply in the water using 1-inch or 3-inch chlorine tablets.
For small and medium above-ground pools, the Merkia floater can be a useful low-cost accessory. For larger pools, heavy swimmer use, algae problems, or cloudy water, you will still need proper testing, circulation, and occasional shock treatment.
Quick verdict
The Merkia 7.5” Floating Chlorine Dispenser is worth considering if you want a cheap, simple, and low-maintenance way to use chlorine tablets in an above-ground pool.
Its biggest strengths are the large floating body, adjustable chlorine release, compatibility with common tablet sizes, and easy top-loading design. It makes the most sense for pool owners who already understand basic water care and want a simple tablet floater rather than an automatic chlorinator.
Its biggest limitation is that it does not measure or control chlorine precisely. You still need to test your water regularly and adjust the dispenser opening based on your chlorine readings.
Best for: Routine tablet chlorination in small to medium above-ground pools.
Skip it if: You want precise automated dosing, app control, or a full pool chemical system.
Main watch-out: Chlorine tablets add stabilizer over time, so monitor your cyanuric acid level.
Merkia 7.5” Floating Chlorine Dispenser specs
Feature | Details |
Product type | Floating chlorine tablet dispenser |
Size | 7.5-inch floating body |
Tablet compatibility | Designed for 1-inch and 3-inch chlorine tablets |
Best use | Slow-release chlorine maintenance |
Pool type | Above-ground pools, small inground pools, and spas |
Flow control | Adjustable vents / release setting |
Loading style | Top-loading cap |
Material | Plastic |
Best paired with | Test strips or liquid test kit, chlorine tablets, weekly water testing |
Main limitation | Passive chlorine release, not precise automatic dosing |
The key thing to understand is that this is a chlorine tablet holder, not a chemical balancing system. It can help maintain chlorine between tests, but it cannot tell you whether your water is balanced, whether your stabilizer is too high, or whether your pool needs shock.
What the Merkia floating chlorine dispenser does well
The Merkia 7.5” floater is designed for one simple job: holding chlorine tablets and releasing chlorine gradually as it floats around the pool. That makes it useful for routine maintenance, especially if you do not want to add chlorine manually every day.
Simple weekly chlorine maintenance
The main benefit of this dispenser is convenience. You load chlorine tablets into the chamber, adjust the vent opening, and let the floater move around the pool.
For above-ground pool owners, this is useful during normal weekly maintenance because it helps keep sanitizer in the water between tests. It works best when your pool is already clean, balanced, and circulating properly.
If your pool is already green or cloudy, this should not be your only treatment. In that case, follow a proper algae or cloudy water cleanup process first, then use the floater for ongoing maintenance.
Works with common chlorine tablet sizes
The Merkia 7.5” dispenser is designed to hold common chlorine tablets, including 1-inch and 3-inch tablets. That makes it more flexible than smaller floaters that may only work well with mini tablets.
For most above-ground pool owners, 3-inch tablets are the more common maintenance option. Smaller 1-inch tablets can be useful for smaller pools, spas, or situations where you want a slower and more controlled chlorine increase.
Always follow the chlorine tablet label for dosage. Do not guess based only on the size of the floater.
Adjustable chlorine release
The adjustable vent design lets you control how quickly water flows through the dispenser and dissolves the tablets.
A wider opening usually releases chlorine faster. A smaller opening slows the release. This matters because chlorine demand changes depending on sunlight, water temperature, swimmer load, rain, debris, and pool size.
A good starting point is to begin with a lower or middle setting, test the water after 24 hours, and adjust from there. If free chlorine is too low, open the vent slightly. If chlorine is too high, reduce the opening or remove the floater temporarily.
Large floating body for better stability
The 7.5-inch body gives this dispenser more buoyancy than many small basic floaters. That can help it stay more stable on the water surface, especially in above-ground pools with return jet movement or mild wind.
This does not mean it is impossible to tip, get stuck, or drift into one area. Like any floating dispenser, it can still end up near ladders, skimmers, covers, or corners. Check its position regularly.
Low-cost alternative to an inline chlorinator
An inline chlorinator is more controlled, but it costs more and usually requires plumbing into the pool system. A floating chlorine dispenser is much simpler.
For smaller above-ground pools, the Merkia floater is a cheaper option if you only need basic tablet chlorination. It is not as precise, but it is easier to use and does not require installation.
What to know before using chlorine tablets in a floater
Chlorine tablets are convenient, but they are not perfect. Most common 3-inch chlorine tablets are stabilized, which means they add cyanuric acid to the water over time.
Cyanuric acid helps protect chlorine from sunlight, but too much can make chlorine less effective. If your stabilizer level gets too high, your pool may look cloudy or algae-prone even when tablets are still dissolving.
This is why you should not rely on a floater blindly for the whole season. Test your water regularly, especially free chlorine, pH, alkalinity, and cyanuric acid.
If you are unsure how much water your pool holds, use a pool volume calculator before dosing chemicals.
How to use the Merkia 7.5” Floating Chlorine Dispenser
Always follow the chlorine tablet label first. Pool chemicals are strong and should be handled carefully.
Step 1: Test your pool water first
Before adding tablets, test your free chlorine, pH, alkalinity, and cyanuric acid level.
Do not add tablets just because the floater is empty. If your chlorine is already high or your stabilizer level is climbing, adding more tablets can make the problem worse.
Step 2: Open the dispenser
Remove the top cap and check that the inside of the dispenser is clean and dry enough to handle safely.
Wear gloves when handling chlorine tablets, and avoid breathing in dust or fumes from the container.
Step 3: Add the chlorine tablets
Place the recommended number of chlorine tablets into the dispenser based on your pool size and the tablet label.
For smaller above-ground pools, do not automatically fill the dispenser completely. Start conservatively and adjust based on test results.
Step 4: Adjust the vent opening
Set the adjustable release vent to a low or medium setting to begin.
After 24 hours, test the water again. If chlorine is too low, open the vent slightly. If chlorine is too high, reduce the opening or remove the floater until levels return to a safer range.
Step 5: Place it in the pool
Place the floater in the pool and let it move around the surface.
Keep it away from direct contact with vinyl liners, ladders, steps, skimmers, and return fittings where concentrated chlorine could sit in one area.
Step 6: Check and refill regularly
Check the dispenser during your normal pool maintenance routine.
Refill tablets only when needed, and keep testing your water. The floater should support your chlorine routine, not replace water testing.
Safety tips for using a floating chlorine dispenser
Never mix different pool chemicals inside the floater. Do not combine chlorine tablets with shock, bromine tablets, granular chlorine, or any other chemical.
Do not let children play with the dispenser. Remove it from the pool during swimming if it gets in the way or if there is any chance children may handle it.
Do not leave the floater sitting directly against the pool wall or liner for long periods. Concentrated chlorine exposure can fade or damage vinyl.
Store chlorine tablets separately in a cool, dry, ventilated area and keep the container closed when not in use.
Merkia floating chlorine dispenser pros and cons
Pros
Affordable and easy to use.
Works with common 1-inch and 3-inch chlorine tablets.
Adjustable vent helps control chlorine release.
Large 7.5-inch body gives better float stability than tiny dispensers.
Good for routine chlorine maintenance in above-ground pools.
No plumbing, batteries, app, or installation required.
Cons
Not precise like an inline chlorinator or automated dosing system.
You still need to test water regularly.
Chlorine tablets can raise cyanuric acid over time.
Can drift into corners, ladders, skimmers, or pool covers.
Not enough by itself for algae cleanup, cloudy water, or major chlorine correction.
Plastic parts may wear, crack, or fade over time.
Who should buy the Merkia 7.5” Floating Chlorine Dispenser?
Choose the Merkia 7.5” Floating Chlorine Dispenser if you want an inexpensive way to maintain chlorine with tablets in a small or medium above-ground pool.
It is a good fit if you:
Have a vinyl above-ground pool.
Use chlorine tablets for routine maintenance.
Want a simple floater instead of an inline chlorinator.
Test your pool water regularly.
Need an affordable backup or replacement dispenser.
Prefer a no-installation option.
It is especially useful for pool owners who want a simple accessory that helps maintain sanitizer between weekly pool care sessions.
Who should skip it?
Skip the Merkia floater if you want precise chemical automation or if you do not plan to test your water.
You should also skip it if your pool has ongoing algae, cloudy water, or low chlorine problems that need a stronger treatment plan. A floater will not fix those issues by itself.
If your pool regularly struggles with green water, start with a proper algae cleanup process.
If the water is cloudy, check filtration, chlorine level, pH, and circulation before relying on tablets.
Merkia floating dispenser vs other chlorine options
Option | Best For | Main Limitation |
Merkia floating chlorine dispenser | Cheap, simple tablet chlorination | Passive dosing is not precise |
Inline chlorinator | More controlled tablet feeding | Costs more and requires plumbing |
Liquid chlorine | Fast chlorine increase and shock support | Must be measured and added manually |
Granular shock | Weekly shocking or algae cleanup | Not for slow daily maintenance |
Saltwater system | Automated chlorine generation | Higher upfront cost and equipment setup |
For most above-ground pool owners, the Merkia floater makes sense as a simple maintenance tool, not as your only water-care product. Use it to help maintain chlorine between tests, but keep shock, testing supplies, and proper filtration as part of your regular pool care routine.
Compare before you buy
If you are deciding whether this floater is enough for your pool setup, these guides can help:
👉 Chemicals & Water Care for Above-Ground Pools — start here if you want the full hub for chlorine, shock, algae treatment, clarifiers, and testing.
👉 Clorox XTRABLUE 3” Chlorine Tablets Review — useful if you want a tablet option to pair with a floating dispenser.
👉 Champion Liquid Pool Shock Review — better if you need a fast chlorine boost for algae, cloudy water, or urgent cleanup.
👉 Pool Shock 101 — explains when and how to shock your pool safely.
👉 How to Clear a Green Above-Ground Pool — use this if your pool already has algae.
👉 Pool Volume Calculator & Chlorine Dosage Guide — use this before adding chemicals if you are unsure how many gallons your pool holds.
Final verdict
The Merkia 7.5” Floating Chlorine Dispenser is a practical, budget-friendly pool accessory for above-ground pool owners who use chlorine tablets.
It is not exciting, and it will not solve every pool water problem. But as a simple floating tablet dispenser, it does what most pool owners need: holds tablets, floats on the surface, and gives you some control over chlorine release.
Buy it if you want an inexpensive floater for routine tablet maintenance. Skip it if you need precise chemical control, algae cleanup, or a more advanced chlorination system.
Check the latest price and availability on Amazon before buying, especially if you need a large floater that works with common 1-inch and 3-inch chlorine tablets.
FAQ
What does the Merkia floating chlorine dispenser do?
The Merkia floating chlorine dispenser holds chlorine tablets and releases chlorine slowly into the pool water as it floats. It is designed for routine sanitizer maintenance, not for precise chemical dosing or algae cleanup.
Can the Merkia floater use 3-inch chlorine tablets?
Yes, the Merkia 7.5” floating chlorine dispenser is designed to work with common chlorine tablet sizes, including 1-inch and 3-inch tablets.
Is a floating chlorine dispenser enough for an above-ground pool?
A floating chlorine dispenser can help maintain chlorine, but it is not enough by itself. You still need to test the water, balance pH and alkalinity, clean the filter, brush the pool, and shock when needed.
How many chlorine tablets should I put in the floater?
Follow the chlorine tablet label based on your pool size. Do not fill the dispenser blindly. Start with the recommended amount, test the water after 24 hours, and adjust the dispenser opening as needed.
Should I remove the chlorine floater while swimming?
It is often best to remove the floater during swimming, especially if children are using the pool. This prevents people from handling it and stops it from getting in the way.
Can a chlorine floater damage a vinyl pool liner?
A floater can cause problems if it sits against the liner in one spot for too long. Concentrated chlorine exposure may fade or damage vinyl. Keep it moving freely and do not let it rest against the wall, steps, or ladder.
Can I put pool shock in a floating chlorine dispenser?
No. Do not put pool shock, granular chlorine, bromine, or mixed chemicals into a chlorine tablet floater. Use only the type of tablets the dispenser and chemical label allow.
Does a chlorine floater raise cyanuric acid?
If you use stabilized chlorine tablets, they can raise cyanuric acid over time. Test stabilizer levels regularly so chlorine remains effective.
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