Louiseness
Fish Addict
So, basically when I put these 2 together, I'm reading I know you haven't seen any ammonia spikes, but the cause is ammonia spikes. That doesn't make sense. I test ammonia almost every day. And definitely so since the fish have died. I don't have ammonia spikes--unless it's possible for an ammonia spike to be very high in less than a day and then go back to normal...
Sorry, that wasn't very clear of me. I was just saying that, normally, adding too many fish at once tends to cause an ammonia (or nitrite) spike. Not saying that this was necessarily the reason your fish were dying - although, as has been pointed out, a small spike (or indeed a series of mini-spikes) can harm fish.