I’ve heard of plastic bottles, but i was wondering if i was able to use these, they came with a box of frozen foods fed’x to me to to help keep food cold. So I’m not 1000% sure if its the right kind of think like packing peanuts that i can use. Was thinking of either cutting them into small squares, or just in the shape of the pot to fit at the bottom, Perlite is expensive and this what what i have at the monent.
Any advice or wisdom is better than none. And there are more than one way to do something so no bashing each other for their opinion/experience <3