Yeah, I though of tank size and if it's worth the extra cost after I started the thread/poll. So far I'm leaning towards A4F. I already bought 7 lb bags of the BRS stuff Calc, Alk and Mag, but I haven't opened it and I'm assuming that I could sell it for a little loss just to get rid of it.All-for-reef. The extra cost is going to be negligible for the tank volume, considering you need only one doser and container. It’s very easy to dial in (use alk gain after 24hrs of dosing to dial in your dose).
Only down side is that you won’t get the higher ph boost. However on the plus side, you can dose it in a lower flow area or dose all of it at once unlike a 2 part solution.