How many marine fishes can i put on a 30 gl tank?

Question

and what kind and size

Answer 1

You can't ask this question.  It depends on so many things. Smaller fish are better, you will need tons of snails and crabs to keep things clean,

I prefer gobies, they have interesting personalities.

Look up some different fish online.

I believe a yellow tang will fit in your tank, beautiful fish. Maybe a starfish (very cool) clownfish are neat,

the below link is a compatibility chart, look somethings up.

just make sure not to overcrowd.

Answer 2

Generally 2" of fish per gallon for saltwater, but it does depend on they types of fish you are thinking about. The cost of saltwater fish are to high to just try and see if it will work. Do some research on each fish you are thinking of getting and compare that info to what you want in there in the long run.

Answer 3

73 no question. thats gotta be it. fo sho.