I float for 30 mins, dip in Bayer for a few minutes, rinse, then stick on rocks. I get them locally from other reefers
First time I bought from Battlecorals.
I have 2 gyres 2k, blasting, but not directly on the frags.
I dose neophos and neonitro when I noticed sometime my Phos and nitrates drop to 0 depending on whe and I test. Now they are no longer 0s.
Okay, so unless you happen to have the exact parameters as the tank you bought coral from you are over looking a very critical step, which is actually acclimating the frag.
Best way to do it is a drip line. I use a gallon water jug with the top cut off. I use my mag cleaner to hold it in place in my sump so it temp acclimates at the same time.
Take the frag and its water
Put it in the jug/container
I put it in my sump and hold it in place with my mag cleaner. I keep the bottom of the jug about 2 inches under the sump water line. This is to hold and match temp
I take my drip line and siphon from my display and drip into the jug. This is a slow process if bought local and my parameters vary from existing parameters but under an hour. If shipped, I do a faster drip but still drip! Maybe 30 minutes, these aren't fish so don't worry about ammonia.
I let the jug fill up double the amount of water the frag came in, I dump half out and re drip. I repeat this 2x. Then I test alkalinity. Once it basically matches my display I know I've acclimated the frag properly.
THEN i move on to the dip.
I leave the frag in the disposable gallon just I acclimated in. I pour enough water out to where I can reach the frag with a gloved hand easily, so 3" of water.
I mix bayers with a disposable plastic fork/spoon until I can't really see the frag any more. I let it sit and stir occasionally for 8-10 minutes.
While waiting I cut the top off another gallon water jug. I fill this with water from my display. This will be my rinse jug.
Frag is done after 8-10 minutes. I cut (no matter how expensive) the frag from the plug! I dont want AEFW eggs. I swish in the bayers aggressively with a gloved (disposable mechanics) hand to remove any stunned pests. I think place in the rinse jug.
There i will glue it to a small rock rubble. So i can easily move it if its not happy with placement in the display later on.
Before you start acclimation and drip be sure to have 2 gallons of fresh salt on hand to replace the amount you took from your system. once or twice wont matter but over time you'll drop your salinity. A good habit is to turn your ato off during this proccess too, so its not topping off as your dripping.
You are more than likely stressing your acros from the get go. Not 100% sure this is your issue, but it's probably contributing to it. If you think about it, we spend all this time to avoid spikes an changes in alk, temp and salinity so why wouldn't a float and drop stress your acropora right off the bat?