Shouldn't Have Gotten Out of Bed this Morning

I keep my small quarantine tank in my kitchen below a shelf of plants.
Currently I have one male crowntail betta in this 2.5 gal QT tank. It
occurs to me today that I can't recall the last time I watered my
house plants so mix up some Micracle-Gro plant fertilizer and watered
each plant including the spider plant above the tank. As I'm
finishing I realize that a bit of plant-food ridden water got onto one
of the spider plant leaves, which of course acts like a tiny water
slide. At supersonic speeds I see this droplet cruise down the leaf and
plop into the tank before I could do anything to stop it.

DOAH! **SMACK HEAD**

Ok don't panic, its just one drop of fertilizer.
No, wait... Panic PANIC

I scoop out the fishy and quickly check the temperature, dump the tank,
rinse well and refill. To reacclimatize the fish I add a couple of
scoops of the new water to his cup.

WAIT, did I dechlorinate the water first?

DOAH! **SMACK HEAD**

Wait don't panic some water treatment facilities don't use that
much chlorine anyway. Oh, but just yesterday I read the water report,
which showed my area, uses 3.8 ppm out of an allowable 4.0 ppm. Ok,
proceed to panic.

Crap, how much amquel/novaqua goes into partially filled betta cup?
Doah, **smack head**

I shouldn't have gotten out of bed this morning.