Wow, is that too much light for the tank, 26W? Pearls may be just from a water change, and oxygen getting trapped down below.
Anyway, nice to see a local Miamian. Love the tank, good thing you removed that annoying center piece / stock light
I agree with aweeby that you should change the hardscape, remove the rocks and decor and get a piece of driftwood and tie some moss on it, for a more natural look. For hiding spots for shrimp, get some cholla wood or bamboo charcoal, easily hidden beneath plants. After your plants grow out more you really won't need a hiding place for the shrimp, as dense plants foliage is enough.