Dad.
Not only marine fish but little gourami, tatras, angels,barbz, and the like.
It will GREATLY reduce mortalities, or " stress"... ahem...
Koi would
certainly appreciate the effort but most folks dont have the means to alter PH (or the time or the chems or the money or the knowledge)
I can tell you the PH of a koi bag that travelled 12-20 hors or more.
It's in the sixes.
Ya got a PH 7.5- 8.5 ?
Toss them in..
Make sure and cover the tank
They'll be fine. Never lost a one like that !
Nor from going cold to hot.. 20 degrees/ in only minutes. No Problem
I did that yesterday with 200 fish.
Hot to 20 degrees
cooler , that fast ?
The rose bushes will love you.
Correctamundo El Jimbo... It would indeed be " Thee Ultimate" but not necessary... with Koi.