What is T-Drops, and is it the same as Tanlin or Nil-Nat?
T-Drops is the same fungus gnat (sciarid fly) root-zone treatment previously sold as Tanlin or Nil-Nat—just rebranded. If you’ve used those products before, T-Drops works the same way and is used in the same systems and growth stages.
What pests does T-Drops actually control?
T-Drops targets fungus gnat and sciarid fly larvae in the root zone. It does not directly kill adult gnats or control mites or thrips. Adult numbers drop over time because the larval stage is interrupted, which is why sticky traps are recommended alongside treatment.
Can I use T-Drops in soil, coco, hydro, or self-watering pots?
Yes. T-Drops is designed for soil, coco, and hydroponic systems, including drip irrigation. In self-watering or wick systems, it still works, but you’ll also need to manage surface moisture since gnats breed in constantly damp top layers.
Is T-Drops safe for edible plants and late-stage flowering?
Yes. T-Drops is listed as safe for edible crops and can be used right up to harvest, including during late flower and final flush. It’s also gentle enough for seedlings and cuttings when used at the recommended rate.
Is T-Drops safe for people, pets, and living soil?
When used as directed, T-Drops is described as non-toxic and microbe-safe. It should not harm beneficial microbes, worms, or living soil biology. As with any garden product, store it securely and avoid ingestion or unnecessary contact.
What is the correct dose rate for T-Drops?
The standard rate is 1 ml per 100 L of water. At that rate, a 20 ml bottle treats up to 2,000 L of solution. The product is described as non-toxic, but accurate dosing ensures even coverage and avoids wasting concentrate.
How do I apply T-Drops correctly?
Apply T-Drops as a root-zone drench by adding it to your normal watering or feeding solution. Fully saturate the medium so there are no dry pockets where larvae can survive. It is not a foliar spray.
How often should I use T-Drops, and how fast does it work?
T-Drops works by interrupting the gnat lifecycle, not by instant knockdown. Use it consistently over multiple waterings. Most growers see gradual improvement week by week as fewer larvae mature into adults.
I still see gnats after using T-Drops—did it fail?
Not necessarily. Adult gnats can continue flying while larvae in the soil are being controlled. Keep applying T-Drops consistently and use sticky traps to reduce adult numbers during the transition period.
Should I treat all plants or only the infested ones?
If plants share the same space, treat all of them. Leaving untreated pots creates breeding zones that can reinfest the rest of the room, even if only one pot seemed problematic at first.
Can I mix T-Drops with nutrients or other products?
Yes. T-Drops is compatible with nutrient programs and does not meaningfully affect pH or EC at recommended rates. Do not use it with hydrogen peroxide, as peroxide can interfere with root-zone friendly treatments.
Can I combine T-Drops with sticky traps or other gnat controls?
Yes. Sticky traps control adult gnats, while T-Drops controls larvae in the soil. Physical barriers like sand or perlite and better watering habits can speed results, but avoid stacking too many treatments at once.
Will T-Drops work if my soil stays constantly wet?
It helps, but moisture management is critical. Constantly wet media encourages gnat breeding. For best results, combine T-Drops with improved airflow and allowing the top layer of media to dry slightly between waterings.
How should I store T-Drops, and how long does it last?
Store T-Drops sealed between 2°C and 22°C. Refrigeration is fine; do not freeze. Shake before use. When stored properly and kept clean, it remains usable for a long time—always follow any date guidance on the packaging.
