stocked way too fast, but overstocked, you really think so? course i have no knowledge about inverts (only that they're much less forgiving of their conditions than fish), i guess i assumed they'd require less space than fish. 16 of anything is quite a lot.
silver, have you been monitoring the levels in your tank as you added livestock? 6 days between your initial setup and adding livestock is really fast, your tank can't have finished cycling at that time--usually you wait a week after your ammonia and nitrites hit 0 before adding anything. and what is Jarkarta unseasoned LR? do you mean uncured or is that a type of LR?
lastly, i'm not sure about this, but is a 150 watt heater suffcient for a 90 gallon tank? anyone know?