This video explains my preferred method for using BTI to treat my plants for fungus gnats. I have found that soaking the mosquito bits and then watering lightly with a highly concentrated liquid to be much more effective than sprinkling them on the soil. It's especially great because you can treat your entire collection in the same day.

Step 1: soak 1 or more tbsp of mosquito bits in water for 24-48 hours
Step 2: transfer the concentrate to a watering can and add a splash to each of your plants
Step 3: repeat weekly until gnats are no longer present

This has worked really well for me and I hope it helps you turn the tides against the fungus gnats in your collection! Links to the mosquito bits below.

--------------------------------------------------------------------------------------------------------------------------------------------------
****As an Amazon Associate, I may earn a small commission on purchases made through the following links, at no extra cost to you. I have included ONLY those products which I personally purchase with my own money and continue to use. I hope you will find value in these items as I have. Thank you!****

Mosquito Bits - https://amzn.to/2QD5fdh

Yellow Sticky Traps - https://amzn.to/3wuyEpz

Neem Oil - https://amzn.to/2SdtJKP

Dr. Bronner’s Castille Soap - https://amzn.to/3u9IXNW

Garden Velcro - https://amzn.to/3f84fav

Osmocote Plus - https://amzn.to/3fagqns

Foliage Pro - https://amzn.to/3wo1oQz

Garden Shears - https://amzn.to/3oArld9

Sisal Rope - https://amzn.to/3fwsa3G

Garden Lime - https://amzn.to/3yqD2HM

Light Meter - https://amzn.to/3fG3SD4

Outlet Timer - https://amzn.to/344DhKB

LED light strips - https://amzn.to/3u9abEH

Hygrometer/Thermometer - https://amzn.to/3fF109y

Camera and Audio Equipment I use:
Sony A7c - https://amzn.to/3vm0vYV

35 1.8 - https://amzn.to/3vaQZrd

Rode Wireless Go - https://amzn.to/2REb8Yj

Joby Gorillapod 3k - https://amzn.to/3bF9zAb

Zomei Tripod - https://amzn.to/3f7TyVt