The perlite sounds like a very good method to use...What do you think about adding a touch of "P" nutrient to the solution to promote root growth? Would it be too much? Thanks for all of the good info...
I'm pretty sure that if you had challenged the fact taht they had no warrant, they would have left you alone anyway. There was no legal reason for any judge to issue a warrant. Their main purpose was to try to scare you into letting them look and possibly find something that they could use...
Looking decent friend... I am thinking that you may need a bit of ventillation, perhaps a small fan to alleviate some of the heat from the lights. You can also try clean water every few feedings to see if the nutrients are building up too much. Good luck...