Started Tropic Marin All for Reef supplement at the package recommended starting dose of 5 mls/25 gallon aquarium water on July 14. My tank is 150 gallon including the sump water, so I started with 30 mls delivered by Apex doser over 24 hours. Initially there was a little dip in alkalinity to between 7-8, so I increased the dose more quickly than the package instructions of 2.5 mls/ 25 gallon per week. I increased AFR by 2.5 mls/gallon every 2-3 days until the alkalinity was consistently above 8 I was dosing 90 mls/day by the end of the second week. Calcium stayed stable between 430-450. Currently I am dosing 110 mls/day and the alkalinity is stable at around 9.
Now the bad stuff. I had a coral die off, mostly SPS, initially only on one rock near the top of the aquarium. This occurred like a wave and progressed across the rock, but there were several SPS not affected. From previous experiences, I think this may be a bacterial issue and not necessarily related to switching to AFR. But could be, since we know that corals do not like change. A week or so later it happened on another rock, but only affected 2 corals.
The other bad thing, that could have caused the corals to die off, is that the pH is running low at 7.8-8.0. My tank has always run a low pH, usually 7.9-8.1, but in summer, with the central air conditioner running, it tends to drop even lower, and I think this has to do more with higher carbon dioxide levels in the house with no fresh air coming in. So again, I don't think that the lower pH is because of switching to AFR necessarily. I've been changing out CO2 scrubber media every week to keep the pH of the tank from dropping below 7.8 at night.
Fish are doing fine, no algae issues. 85% of corals are doing fine and showed no ill affects from the change to AFR. The one down side is the cost. One 1000 ml bottle of AFR lasts me 9-10 days at $33 a bottle. BRS supplements are certainly much less expensive. I changed to AFR because I am using Tropic Marin salt and I don't have to dose trace elements hopefully. Also, I spend way to much time on maintaining my aquarium, so even the elimination of those few minutes it takes to mix up the BRS alkalinity and calcium supplements seemed desirable.
Good luck with your transition.