Disposing of "invasive" water?

[Mount_Prion]

So I just moved my marbled crayfish colony to my new tank's sump, and I've got a big plastic tub with a bunch of old crayfish water and sand in it. I'm pretty sure I've gotten all the crays out and a second inspection today (day after move) seems to confirm this, but there's no way to be 100% certain. I would normally just dump the water down my toilet and trash the wet sand, but I'm concerned that if there's even one little crayfish in there it could start a NYC sewer lobster infestation.

How should I handle this? I was thinking maybe pouring the water out through a net might do it.

 

[oneyedfish]

Add a good splash of bleach to the water. It'll take care of any teeny stragglers.

 

[Mount_Prion]

Add a good splash of bleach to the water. It'll take care of any teeny stragglers.

Oh yeah. So obvious that I feel dumb now.

 

[oneyedfish]

Glad to see you're being that responsible with the remnants of the colony! Honestly I probably would have dumped the water without a second thought. Big ups to you sir.

 

[Mount_Prion]

Thanks, but it's pretty telling of me to worry about lobsters taking over the city but forget something simple like bleach kills fish.

 

[bbortko]

Used aquarium is great for watering your landscaping if you have any. Doubt anything that small will be able to find their way from bushes to a sewer.