two quick questions

I bought some hydroponic nutrients for flowering, can these be used in soil?

also I was thinking it could be a good idea to put a gecko in the grow tent to eat all the bugs, anyone ever done this?

the gecko will run away. he may do queer things to your crop, too. perch on plants......graze them......who knows

Any hydro nute I've ever seen has had soil instructions with it as well. In regards to the gecko, never heard of doing that, if they don't eat plants, not sure why it would be a problem, assuming you can keep the environment happy for him and still maintain ideal plant growing conditions. If your reasoning is really to manage bugs, I doubt he would do much to help with any serious problems, then you risk the life of your gecko when you have to treat your plant with bug killers.

not really sure ive held scorpions with my plants before but they were just spices and herbs not pot but they didnt seem to negatively or positively effect the plants. but you can definitely put carnivorous plant in with your plants i used to always keep a few in my grow room