This is what I have used. Can I use it for the new water do you know?
I have about 20 fish, 5 neon tetras 2 male guppies 3 female guppies, 3 danios, 3 mollys (1 gold/black and 2 balloon), 1bala shark and a couple of tiny endlers and 2 cories.
I know this is probably too many for my tank...