Not trying to argue with you or doubt your experience, but I’m willing to bet that that wasn’t the cause of you losing those corals. In most cases, drip acclimation probably doesn’t cause much harm. But let me ask you this, do you dip your corals? And if so, do you slowly acclimate them to the dip? And if not, why do corals need to be drip acclimated to tank water and not the harsh chemicals in a coral dip? Again, not trying to argue or condescend, I know that drip acclimation is what a lot of people were taught, but logically, and physiologically it doesn’t make much sense when you really think about how corals work and what drip acclimation is trying to achieve.
From my experience in particular:
- about the DIP: I do dip them always after I acclimate them to the system I'll add them to. (I do DIP them in Revive, RX, Dettol and Iodine. All the way I describe here)
- not acclimating to the DIP: usually the coral has been stressed enough during the transport, that's correct. Each DIP takes me about 3-5min (only the Iodine dip I do for 15-20min) and pre-washing them with tank water between each DIP for 10 min to settle a bit after each DIP.
* As the DIP time is for a few minutes it can't take that long to acclimate it to the DIP solution.
-"....but logically, and physiologically it doesn’t make much sense..." Here can't agree: what if the Salinity is different (say I have 1.0265 S.G the system they come from is 1.0245 S.G.) that difference in the salinity is also very harmful for the corals, as the NaCL in the cells need to be lowered or raised slowly, or the coral can get it self in expanding or compressing the cells where there is difference in the salinity (forgot how to explain it scientific way).
* Also the difference in the Alk in the water with over 0.4-0.5dKH will be very harmful for the coral for sure. Why then raising the Alk or lowering it isn't good to be done straight away, and we have to do it usually for a minimum time frame if we have to raise it or lower it ?!
* What if your Alk is 9.5 dKH and the coral come from 8 dKH (the shops usual Alk to keep the corals more vibrant rather than growing, as this will add much on the shop expenses, I keep in the middle for my shop 8.7-9dKH)
P.S. I'm not arguing as well, but that I learned through the hobby for the last few years and since I have the shop as well. That way never fails me. Here are more experienced reefers than me, but my methods work perfectly for me and I prefer to spend that extra time rather than having issues. Next day almost always all of the corals are in good healthy condition for sale (only if the coral isn't been in good condition when I got it, then will need few days more).