I don't feel that a 10g tank is big enough for a clownfish OR a mandarin dragonette, and certainly not both.
I have mine in a 58g, with a 20g sump/fuge, it eats frozen AND I culture copepods to continuously stock my tank. My mandarin explores the full length of the tank all day long pecking at rocks eating pods, even though I feed it frozen.
10g is just not big enough to keep fish long term....except maybe goldfish or freshwater beta.
Sure, you COULD live your life in a coat closet...but would you want to?
That said, mandarin dragonettes are compatible with almost all fish that don't view it as food...most fish completely ignore it. My clowns certainly do.
I'm the friend that's setting up this tank with the OP, I know where you're coming from with the 10g being too small for much, but the guys in the nano reef forum have a lot of success with clowns in their 10g. Why do you say it's too small for a clown? And I've read people having success with mandarins in a 10g, while it's not the best of ideas, it has worked.
I've seen people keeping clowns in a 10g for at least a year, some more. I understand there are different types of clowns that grow to different sizes. I also understand the dragonet is very hard to take care of. How is it like feeding a kid junk food? We would feed both of them properly, we would just try to ween the madarin onto pellets or frozen. People have done that and made it work. ORA is tank raising those right now
as far as being compatable, yes, they are and you won't have any problems. Size of the tank is another issue entirely...
and Bassplaya12 - I read a thread on here of a woman mourning the death of her 17 year old clown.... crazy!!
I meant the kid will get overweight at an early age and end up with health problems and die. I'm not comparing what you feed your fish, I'm comparing how you can get away with bad things that seem ok, but eventually they catch up to you.
That is crazy!
Gotcha, the bad thing here being keeping fish in too small of a tank. Lot's of people do it still. What fish do you honestly think we could get away with? Really keeping a reef fish in anything less than 500g is bad, but people do it.