I have received yesterday a shipment of beneficial nematodes (Steinernema feltiae). The plan is to use them as both a way to take care of a suspected root parasite in some plants and food for utrics.
The nematodes came in a container filled with vermiculite which serves as a carrier. One of the ways of delivering the nematodes to the plants involves placing the contents of the container into 2 gallons of water, let the nematodes wash out from the vermiculite and using the now nematode rich water on plants.
I am concerned about minerals that may leach out into the water from vermiculite raising its TDS count. Searching the topic showed that Vermiculite is used for some plants as a soil component, but obviously not for all.
Anybody has comments/suggestions etc?