I had someone spike my tank. Never did find out what was thrown in it, but ended up losing a 12" arowana, 4x8" pacus, a 16" pacu, an albino channel cat, and a blue chanel cat (both around 8"). They were fine when I left for the store, and when I returned 15 minutes later, the pacus were swimming upside down, and the cats were already dead. The larger pacu and the arowana took a little longer to die. The rest of the fish in the tank seemed unharmed, including another arowana. Note to self-never trust a begrudging roommate. This pic is just the first ones I fished out of the tank.

