Most Popular
Sora Series
AquaSense Series
Skimmer & Bundle
Retail Edition
Accessories
A pool robot can pick up leaves, bugs, and grit just fine and still leave a faint layer of dust on the floor. The problem is often the filter, not the cleaning power. Fine silt, pollen, and dead algae can be small enough to slip through a standard basket. Beatbot designed its Ultra Fine Filter Basket for exactly that kind of cleanup.
What Does a Micron Rating on a Pool Filter Mean?
A micron, written as μm, is one-thousandth of a millimeter. The smaller the number, the finer the particles a filter can trap.
A 150 μm filter is built for the everyday stuff you can usually see: leaves, hair, grit, and larger bits of dirt. A 3 μm filter goes after the dustier mess—fine silt, pollen, fine sand, and tiny algae particles that can slip through a coarser basket.
Beatbot’s Sora 30 and Sora 70, for example, use a 150 μm standard filter and support an optional 3 μm ultra fine filter. On paper, that means the finer filter can capture particles up to 50 times smaller.
But smaller is not automatically better. A very fine filter can clog faster when the pool is full of leaves or heavier debris. Think of micron rating as a way to match the filter to the mess, not as a score where the lowest number always wins.
How Beatbot’s Ultra Fine Filter Basket Works
Beatbot’s Ultra Fine Filter Basket is designed for a very specific job: picking up the fine dust and residue that the original basket may leave behind. It is a supplemental filter rather than a replacement for the standard basket in every cleaning cycle.
The Sora 70 version is a good example. Its 5 L basket uses a dual layer design. The outer coarse basket can be used on its own and filters debris down to 400 μm, making it better suited to heavier debris and first pass cleaning. Inside sits a non woven 3 μm filter for much finer material such as dust, algae particles, and other ultra fine debris.
The two layers also help keep the fine filter from clogging too quickly. The inner 3 μm filter cannot be used by itself; it has to sit inside the coarse basket. If the pool still contains a lot of leaves, grit, or larger debris, starting with the ultra fine filter can restrict water flow and affect cleaning performance.
For the best results, start with the original Standard Filter Basket to clear out larger debris, then switch to the Ultra Fine Dual Filter Basket for the fine dust and residue that remain.
The Sora 70 filter is also a consumable part rather than a permanent one. The inner non woven filter has a recommended lifespan of about 40 cleaning cycles, or 150 hours of cleaning. Replace it sooner if the material remains gray or stiff after washing, or if the robot’s debris pickup begins to noticeably decline.
The exact capacity, filtration rating, and compatibility vary by Beatbot model, but the basic idea stays the same: clear out the bigger mess first, then use the ultra fine filter for the particles that are harder to catch.
How the Ultra Fine Dual Filter Basket Performs in Real Pools
The micron ratings explain what the Ultra Fine Filter is designed to do, but owner feedback shows what that can look like in a real pool.
The ultra fine filter for my Sora 70 works great! It picks up the very fine dust here in Texas, making my pool clearer and cleaner. I find it's easier than expected to clean. From what I can see, it uses the coarser outer filter to trap larger debris, then the finer filter catches the fine particles. I'm very happy I added this to my Sora 70. — Gary
We are using this with our Sora70. I thought this would be a simple blanket that you would insert into your existing filter basket, but this comes with its own basket which means it is easy to switch out. I thought our pool was pristine until this thing showed up! The attached pictures from Herbie doing 3 eco runs of I believe 45 minutes each! This collects the ultra fine particles that you do not see! Now my pristine pool will actually be pristine! — OKeefe P.
I live in Arizona where we get frequent dust storms. This captures so much of the very finest dust/silt. It is difficult to clean, but it does a great job. — Kim L.
When Do You Need a Beatbot Ultra-Fine Dual Filter Basket?
Not every dirty pool needs an ultra-fine filter. If your robot is mostly picking up leaves, bugs, grit, and other debris you can easily see, the standard basket is usually the better choice.
The Ultra-Fine Dual Filter Basket becomes more useful when the pool looks clean from a distance but still has that stubborn dusty film on the floor. Fine silt, pollen, and dead algae can be small enough to slip through a coarser filter, only to settle back down once the water becomes still.
One easy way to spot the problem is to watch what happens when the robot passes over the debris. If a light cloud of dust lifts off the floor, hangs in the water, and later settles again, finer filtration is probably what you are missing.
The same goes for pools in dusty climates, during heavy pollen season, or after an algae treatment. In those cases, the big debris may already be gone, but the last layer of fine residue can be much harder to catch.
Should You Use the Ultra-Fine Dual Filter Basket Every Time?
Probably not. The Ultra-Fine Dual Filter Basket is best thought of as a second pass, not the filter you leave in for every cleaning cycle.
Its 3 μm filter is great at catching the dusty stuff a standard basket can miss, but it also fills up faster. Send it into a pool full of leaves, grit, and larger debris, and you may spend more time rinsing the filter than you need to. A heavily loaded fine filter can also restrict water flow and make the robot less effective.
A better routine is simple: let the Standard Filter Basket do the first pass. Once the leaves, bugs, and larger dirt are out of the way, swap in the Ultra-Fine Dual Filter Basket to pick up the silt, pollen, fine dust, and algae residue left behind.
Which Beatbot Robotic Pool Cleaners Work With the Ultra Fine Dual Filter Basket?
The ultra fine dual filter basket is made for specific Beatbot robotic pool cleaners rather than the entire lineup. The Sora 70 and Sora 30 each have their own compatible dual-layer basket, combining a coarse outer filter with a 3 μm inner filter for fine dust, algae residue, and other ultra-fine debris. If you use a Sora 10, Beatbot offers a separate Ultra-Fine Filter Basket designed for that cleaner. So if fine dust keeps showing up after a normal cleaning cycle, first check which Beatbot robotic pool cleaner you own, then choose the filter basket made specifically for it.
FAQs
Can an Ultra Fine Filter Basket pick up fine dust from a pool?
Yes. Ultra-fine filters are designed for small particles such as fine dust, silt, pollen, and algae residue that may pass through a coarser filter basket. A 3 μm filter, for example, can capture much finer debris than a standard 150 μm filter.
Is a 3 μm pool filter better than a 150 μm filter?
Not for every job. A 3 μm filter catches much smaller particles, but it can also clog faster when the pool contains lots of leaves, grit, or larger debris. A 150 μm standard filter is usually better for everyday cleaning, while a 3 μm filter works well as a finer second pass.
Should I use an Ultra Fine Dual Filter Basket for every cleaning cycle?
Probably not. Start with the Standard Filter Basket when the pool has a mix of larger debris, then switch to the Ultra-Fine Dual Filter Basket when you want to remove the fine dust and residue left behind.
Can the inner 3 μm filter be used by itself?
No. On Beatbot’s dual-layer filter baskets, the inner ultra-fine filter is designed to work together with the outer coarse basket. The outer layer catches larger debris before it reaches the finer filtration material.
Can an Ultra Fine Filter Basket remove dead algae?
It can help collect the fine residue left behind after algae has been treated and killed. Dead algae often breaks down into very small particles that settle on the pool floor, which is exactly the kind of debris a finer filter is designed to capture.
How often should I clean an Ultra Fine Filter Basket?
Clean it after each fine-debris cleaning cycle, especially when the pool contains a lot of dust, silt, pollen, or algae residue. Fine filtration media holds onto much smaller particles, so regular rinsing helps maintain water flow and cleaning performance.
Which Beatbot robotic pool cleaners can use an Ultra Fine Filter Basket?
Compatibility depends on the robotic pool cleaner. The Sora 70 and Sora 30 have model-specific Ultra-Fine Dual Filter Baskets, while the Sora 10 uses a different Ultra-Fine Filter Basket. Always choose the filter designed specifically for your Beatbot cleaner.
