Depends on the coral. All coral I just throw in willy nilly after temp. acclimate. The way corals work is they suck in water so their salt is equal to the salt in the water (remember osmosis from biology?) so if the salinity changes, they spit out all the water and suck new water in, so they rebalance themselves. Drip acclimating means the salinity is constantly changing, which means that coral is doing the spit/take in thing a billion times trying to balance itself out and this stresses the coral. Zoas, palys, SPS, LPS, whatever, I always temp acclimate and throw them in. Anemones I temp acclimate then do a fast drip, slower if they show stress. These are more ‘animal’ than corals are (even though they’re animals too) so they have to be treated more like fish. Nems usually take a 10 minute ‘drip’ (I add a shot glass of water every minute or so) then I check the salinity, if it’s within .02 of my tank then it’s good to go. I do not drip if it’s already in that range. Clams I treat exactly like a fish, long temp acclimation then a super long drip cycle (like 45 minutes to an hour). That’s it! Sorry for the long post. Good luck with your acclimations!