What can make your tank crash?

[Pinki]

Hello... I hope everyone had a good holiday.

No my tank has not crashed but I'm working on a presentation and I wanted your input.

What do you think are top 10 reasons peoples tanks crash.

Happy New Year!!!

[lanxang]

broken heater - over heat tank or doesn't work in the winter
chemical unbalance
neglect
Murphy's law

can't think of anything else right now

[Marko9]

power failure is a biggie

[JusTartedReefer]

Bad Children

[MonKei]

Too much (livestock/coral/inverts/etc), too fast..
Using strait tap water to top off.

[sjonathan]

over feeding

[drdoolittle]

too many changes in a short time..

[mothra]

Most of the crashes that I've known about were caused by...

Power failure
Heater or Chiller malfunction
Auto top off malfunction (fills tank with freshwater)
Kalkwasser overdose
Disturbing a mature sandbed

[edsimmons]

Cucumber, Sea Apple, Cow Fish death.

[Sandman71]

not being patient, overfeeding

[Auntbeez]

Not realizing SW/Reefing is far less forgiving than FW.
Going on vacation, and forgetting your house sitter is not a reefer.
...And everything mentioned above

[plankton]

Toxic additives.

You would be surprised what people put in their tanks without first either researching what it is and how it should be used or if there is no non-biased information then not adding it.

Just some examples:

1) Copper to a reef tank with inverts

2) Adding too much phosphate adsorbant materials too quickly to a reef tank and shocking the inverts (either with the sudden change in phosphate levels or alk).

etc.

Scott

[Pinki]

Thank you guys... some of these ( bad children) I never thought of

[Robert4025]

Bad wife that got really mad at you for spending too much time with your corals than with her?