I figured something would be out of whack.
Hey, glad to be of service... further to the O2 thing, be careful with the inches of fish per gallon recommendations that are sometimes made. There is some sort of calculation you can do to figure out how much fish you can have with a given surface area of air to water contact, but I can't find the book I used to have with that stuff in it. It is different depending on the fish you are planning on keeping ie: cold or tropical temperatures, freshwater or marine.
To be safe, understock. I have a 20 gallon that will eventually house a pair of Bluestripe Pipefish and a Yasha or Griessinger's Goby. Total length between all fishes will be about 6 inches, probably less, and that still seems like too much... I'll likely only get the pipefishes.