Bubble coral out for a 10gal. Too big, too aggressive.
Great Softies for beginners:
1. GSP (put it on an island or get the branching GSP variety)
2. Rhodactis mushrooms
3. Pulsing xenia stricly on an island; in a 10gal I would weigh heavily decision to add
4. Toadstools
5. Zoanthids
6. Palythoas--keep separated on islands/easy maintenance areas depending on variants (e.g., nuclear green palys will overrun everything if you don't keep them separated. Ditto with pandoras aka fairy dust aka cinnamon apples)
7. Cloves
Great LPS for beginners:
1. Duncan (hit or miss, but generally good canary in a gold mine to tell you if something is off)
2. Trumpet/Candy Cane (Caulastrea)
3. Favias / Blastos / Acans, when you get a bit more comfortable and have mid-light/mid-flow spots to place them
Great SPS for beginners:
1. Pavonas --> beware the "hairy/cactus" pavona, which allegedly can be very invasive
2. Cephastreas --> careful for placement as they can encrust to the point of invasiveness
3. Birds nest / styplophora, when you get more comfortable
Great Nems for beginners:
1. Rock Flower Anemones, aka RFAs
Great macroalgae for beginners:
1. Codium
2. Botrycladia
3. Gracilaria hayi aka pom pom Gracilaria
All of the above depends on how you set up and run your tank. Live rock is going to give you a major boost. Water changes in a 10g are pretty easy to do or even automate. Algae control methods affect your corals.
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Easy corals NOT recommended:
1. Kenya trees--drop trees, spread everywhere
2. Pocciliopora--if unlucky, can get the type that spread by dropping polyps and get everywhere
3. Discosomas--in my experience, can be hard to keep in one place; let loose and float around to other parts of tank
Good luck!