research and more research is the only way to get ready. there's plenty of proven ways to start a tank. no need to re-invent the wheel
ammonia will not lower on its own. It will only build up. your base rock has no bacteria to break down the ammonia. Stress Zym+ removes chlorine from water, not ammonia. Pimafix is a bacterial infection medication. You should worry about water quality first THEN medication...
BTAs won't survive in a brand new tank. You need a cycled tank of 3 months or more (if you know what you are doing). Some people say 6 months to a year before adding anemone.
BTA will inflate and deflate when they are new to a tank. they are performing internal water changes. they will look good and then look bad. your tank is not cycled. your 65 DT is still cycling.. switching the BTA and clowns over after it's cycled may save the clowns, but not the BTA..
I suggest you return the BTA. then do massive water change in the 10 gallon until ammonia is all gone. then keep doing water change until your DT is ready.
They don't do returns where I got it. I got my buddy coming over to help me out with my dt. The bta may have to stay in the 10 for awhile if he makes it. Hopefully this amquel plus does its job. On a positive note the clowns have seemed to pair up which makes me extremely happy!