Okay, I'm a freshwater guy so all I've got is a 15 gallon AIO cube. I have mostly softies, a bubble tip anemone, and a hammer that's doing really well for some reason. I'd like to do more LPS but I don't have any test kits yet. I heard about that Tropic Marin AFR stuff and how you only have to test for alkalinity if you dose it. So my question is, can I just get and alkalinity test kit and maintain that by using Tropic Marin? Do I even need this or can I just get by with doing water changes. I do 10% weekly at least, although it's been more lately because I've been getting a lot of corals. Oh also I use the plain old instant ocean mix.