What is the ideal S.G. for my 30-gallon tank. I think that it may be a
little high (1.028) although the current occupants seem happy.

1 percula clown
1 cleaner shrimp
4 scarlet hermit crabs
1 leather coral
riccordea
8 lbs. of live rock
other mushrooms

I want to add a six line wrasse and more live rock later. Should I try to
bring down the S.G. to 1.025 or 1.026?

Thanks.

Maddie