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🌱 Keep gnats out and your plants thriving—naturally unstoppable!
By Bill & Ben Anti Gnat Pot Topper is a 1L natural powder that combines diatomaceous earth pest control with slow-release fertiliser. It forms an insect-proof barrier on soil to stop fungus gnats from laying eggs, kills larvae, and enhances soil hydration with a PH neutral formula. Safe for children and pets, it nourishes plants while protecting them, making it the perfect all-in-one solution for healthy, gnat-free indoor gardening.





| ASIN | B0DQVDK1RY |
| Active Ingredients | Diatomaceous Earth |
| Best Sellers Rank | 13,900 in Garden ( See Top 100 in Garden ) 149 in Indoor Multi-Insect Control |
| Brand Name | By Bill & Ben |
| Country of Origin | United Kingdom |
| Customer Reviews | 3.9 3.9 out of 5 stars (126) |
| Included Components | 1 litre of powder |
| Item Form | Powder |
| Liquid Volume | 1 Litres |
| Manufacturer | Vince of London LTD |
| Part Number | G90472 |
| Target Species | Insects |
A**9
Happy Gnat Free Plants !!!
I had a problem with these little critters called fungus gnats ! So I had a look around on the beat and most natural way to get rid of them, as they can and do spread from plant to plant so ya gotta zap em’ all at the same time. This product is amazing , it looks good on top of the plant too! It has been extremely effective in doing exactly what it says in the description and I have not seen a single Gnat since ! However , I did notice some fuzzy green stuff on the surface of said product so I called the company for some information, I was assured it’s just organic material from the soil and definitely not harmful to my plants so just mix it into the soil. All in all I certainly do give this product 5 stars, it’s definitely good value for money as it does the job. The person on the phone was amazingly helpful and friendly. This company gets a massive thumbs up from me !
C**A
Effective Solution That Quickly Stops Fungus Gnats
This product worked exactly as I hoped. It significantly reduced—and effectively stopped—the spread of fungus gnats, which had started to become a real problem around my plants. After applying it, the infestation was quickly brought under control, and I noticed a clear improvement in the overall condition of the soil. The added benefit of fertiliser is a nice bonus, supporting plant health while dealing with the pests. It’s also reassuring that it’s a more natural solution, making it suitable for indoor use without concerns about harsh chemicals.
A**R
Works for a time, good just not long term
Effectiveness: I read previous reviews and seemed to work however for me it wasn't that long lasting after about a month the gnats were back so had to start afresh new soil etc but trying a different product think it's more the gnats that are resilient then the product being an issue as its 2nd pot and new soil different product gnats came back again
A**R
Developed mould
Worked great against gnats, but the top got mouldy after watering the plant once. Not sure if it’s harmful and how to get rid of it…
P**.
Doesn’t work and goes mouldy
I used this on several house plants that had gnats about a week ago. It hasn’t reduced the number of gnats, in fact in the past week I’ve seen more than ever. Worst of all it’s grown mould! I’ve never seen mould on my house plants before but these granules have gone mouldy. Now I’m going to have to scrape them all off.
P**S
Pot topper
Good
D**E
Great product
Worked like a charm!
A**R
Less gnats, more mould
So this product has dealt with my emerging fungus gnats… great! But it’s made about 20% of the pots it was applied to develop a coating of fluffy mould!
Trustpilot
1 week ago
1 month ago