I always opt for clove oil, but here's something I'm wondering. Let's say you do flush a fish down the toilet, how long do you think it lives? It's got a major temp change, chlorine, chloramine, probably ammonia, nitrites and astronomical levels of nitrates....wouldn't the fish pretty much die of shock relatively instantly anyway?
How long can a fish live in a sewer?
http://americanfishkeeping.com/content.php?c_id=45
Flushed goldfish saved from sewer
Flushing goldfish is a crappy thing to do
A goldfish has been rescued by a sewage plant worker, after being flushed down the toilet.
Now nicknamed Pooh, the floundering fish was found in a screen at a sewage plant in Philipshill, East Kilbride.
"Obviously someone thought their pet was on its last legs." Said Jake Huey, the worker who found the fish while cleaning.
"It made its way through the waste water network underneath the streets and popped up in our screens totally revived."
Survivor
When found the fish was rushed to an emergency tank, and has been dubbed "one lucky little fish."
Other items found in sewers include deck chairs, mattresses, false teeth and even an outboard motor.
Scottish Water are now looking for a new home for Pooh, but have urged their customers to dispose of their waste responsibly.
Article originally in Practical Fishkeeping.
Now, how long in a septic tank? I shudder to think... minutes? hours? a day?