Hey friend! I believe you can use it in a reservoir. I highlighted the last line for you.
It says to apply several days apart so I usually mix a batch, pour that in, then wait a few days before the second/third doses. Works pretty quick and they do say it's OMRI Organic. It is nicely ground up and mixes pretty easy. I have only used it in cheap bag soil from the Depot and once in coco. Typically clears up infestations quick.
Their website is a total mess and finding information is not intuitive at all.
Application Instructions:
*To be 100% effective 3 applications need to be made over 15 days.
Apply once every 5 days to break the life cycle.
- Apply it to the top 2 inches of soil as a drench every 5 days until the adults are not flying around anymore. Usually 15-20 days or less to fully eradicate them.
Hydroponic application is the same mixture per gallon as soil but with a large reservoir it's easier to use weight per gallon over teaspoons:
preventative use: 23- 46 grams per 25 gallons
Light infestation: 1-1.5 ounces per 25 gallons
Medium infestation: 2-3 ounces per 25 gallons
Heavy infestation: 3.25 - 6.5 ounces per 25 gallon
- *As in soil you need to add Gnatrol to your hydroponic tank three times total, once every 5 days to break their life cycle.
Link for anyone else interested:
Gnatrol WDG is listed by the Organic Materials Review Institute (OMRI) for use in organic production. Expiration date: March 2025 Bacillus thuringiensis, subsp. israelensis, strain AM 65-52fermentation solids, spores and insecticidal toxins . . . . . 37.4%Other Ingredients . . . . . . . . . . ...
www.organicbti.com
www.autoflower.org
