Webpages of our tanks are up

[Samw]

Originally Posted by Seriak

The sand can still cause a spike.

Just want to ask for my own curiousity what in the new sand could cause a spike?

Each fish you add will cause a spike.

Spikes occur when a lot of dead things start decomposing like dead stuff on uncured live rock. Now, if the liverock being transferred into a new tank comes from a tank with a heavy bioload, that rock already has more bacteria then necessary for the new tank. Even if the rock contains just the right balance of bacteria, would a few new small fish in 42 gallons cause a significant spike? I've never experienced a spike before (and I add stuff quite quickly) so that's why I'm asking.