ok so for the best aclimation possible u need temp, light and chemistry acclimation so for light keep the bag closed ontill u get in the room ur tank is in thenturn off all the lights in the room and aquarium lights and shut blinds and currtens
for temp float the bag in ur tank for 20 min atleast might want to try 25 or 30 (so they are at the exact same temp)
then get a clean bucket dump the water out of the bags in to it u may have to tilt it to make it so the fish are completely submerged
for light still put a towle or something over the bucket (NOT IN THE WATER!!!) so the light dosnt come in
for chemistry then set up a syphon from ur tank in to the bucket make a not in it and tighten it till about 4 drops a second is comming out then let it drip in to the bucket for atleast 2hrs maybe even 2 and a half
after its done dripping u need to take the lid towle or whatever u used of the bucket wait for 5-10 minutes turn the turn the lights in the room on and open currtens then add the fish to the tank and wait 5-10 minutes then turn the lights in the aqurium on for light acclimation
this will be a easy acclimation process for ur clowns
good luck
nate