I just found this thread as someone linked it in another post. I find this interesting, because I have had complete success with my acclimation methods. They are similar to drip acclimation, but I never figured out how to setup drip acclimation, so I followed the essential requirements that bluezoo provided me on my first and only online fish order. The livestock all survived their method. Had some issues with corals, but that's a different story.
I have done this for 5 or 6 other fish, fish transfers, etc. Everytime they have survived without too much stress and done well.
This is the process I take and it works, just curious if this goes against the current methods being indicated:
1. Float bag for 15 minutes unopened to temp acclimate. (lights out.)
2. I open bag While it's floating, use a turkey baster to take around half to 75% of the water in the bag out. And replace it with my tank water.
3. Float for 10 - 15 mins.
4. Remove half the water.
5. Refill with tank water.
6. Wait 10 -15 minutes.
At this point, I usually release the fish. If I feel it's a more sensitive fish or I test the sg and it's still more than .001 off from my water, I will repeat steps 4-6 1 more time then release. I have not done this more than 4 times ever, with maximum time elapsing around an hour.
Corals I have spent more than an hour acclimating, mainly because the last time I got corals was with the purchase of my 125g, and there were so many corals I just couldn't get to them all to replace the water and acclimate, and some of them were too big to easily acclimate, etc. All those corals survived as well, not a single loss.
I'm not sure if my method of removing water and then adding water is really at all similar to the drip acclimation method, but, I was curious on what people's opinion are on this method.
The main reason is because I think there's more than just temp and SG. PH and alkalinity (or acidity) would also be significant factors. If the fish come from fish only tanks at the LFS, ph and alkalinity may not be all that important to the LFS. They may have it higher or lower, and not be testing it much at all unless something is drastically wrong.
So, using some method of mixing the two waters to help the fish acclimate to the new water chemistry, I would think would be easier on the fish. I don't know.
I have taken a fish straight out of my DT and into QT, but that was when the DT was crashing and I had to rescue the fish. Initially the fish was shell shocked int he QT not coming out for 2 or 3 days. Eventually though it came out and is still fine to this day.