Microbe Life Hydroponics FGX Fungus Gnat Killer, 8 fl oz – Natural BTi Soil Drench for Indoor Plants, Safe for Pets

FGX Fungus Gnat Killer from Microbe Life Hydroponics is a natural, BTi-based soil treatment that targets fungus gnat larvae to stop infestations at the source while remaining safe for people, pets, and plants.

If tiny black flies or wilting seedlings have become a recurring problem in your indoor garden, FGX offers a microbial approach that interrupts the gnat lifecycle instead of just removing adults. This ready-to-use solution uses Bacillus thuringiensis israelensis (BTi), a naturally occurring bacterium that harms only gnat larvae when they ingest treated soil water. Designed for potted plants, planters, and hydroponic systems, the formula is formulated to be gentle on roots while helping restore a healthy growing environment.

How does FGX stop fungus gnats in potted plants?

FGX works by delivering BTi into the top layer of potting mix where gnat larvae feed. When larvae ingest treated moisture, their development halts and they fail to mature into flying adults. Repeated applications over a few weeks clear existing larvae and prevent new generations from emerging.

• Targets larvae in the top 1–2 inches of soil where they live and feed
• BTi is specific to certain dipteran larvae and does not harm beneficial insects when used as directed
• Works in both soil-grown and hydroponic setups with routine treatments

What is the correct way to apply FGX to indoor plants?

Measure precisely — the label directs approximately 1.5 mL (about 30 drops) per gallon of water — and apply as a soil drench to thoroughly wet the surface layer. Saturate the top inch or two of media where larvae reside, then allow the pot to drain. Repeat treatments every 5–7 days for two to three weeks until adults stop appearing.

• Use the recommended dilution to avoid over-wetting or runoff
• Saturate the soil surface so larvae ingest treated water while feeding
• Follow a weekly schedule for 2–3 weeks to interrupt multiple larval stages

Is FGX safe for pets, people, and my plants?

FGX contains a natural strain of Bacillus thuringiensis israelensis that targets specific larvae; it does not contain harsh chemical insecticides. When applied according to directions, it is intended to be safe around humans, household pets, and container-grown plants. Always store out of reach of children and follow label instructions for handling and application.

• Formulated without synthetic insecticides or persistent chemicals
• Safe for roots and compatible with most ornamental houseplants and hydroponic systems
• EPA registered and manufactured in the USA

Will FGX work in hydroponics and larger containers?

Yes — FGX is suitable for hydroponic systems and larger pots when used at the correct dilution rate. Apply as a water treatment or soil drench depending on your system, ensuring treated water contacts the zones where larvae are present. For continuous-flow systems, follow system-specific guidance and adjust frequency to your environment.

• Effective in media-filled containers and recirculating hydroponic set-ups
• Adjust application volume to wet the active root zone without oversaturating
• Combines well with good cultural practices like proper drainage and reduced surface moisture

Who is this for? Microbe Life Hydroponics FGX is aimed at indoor gardeners, houseplant enthusiasts, and hydroponic growers who prefer a targeted, biological approach to pest control. It suits anyone looking to remove fungus gnats without broad-spectrum chemicals — from hobby growers with a few houseplants to serious indoor cultivators managing larger systems. Combine FGX with moisture management and sanitation for the fastest, most reliable gnat reduction.

Ingredients

Natural