I have 2 seahorse's in a 30 gal, with them i have
Mandrian, P. Clown, Royal Gamma, Fire shrimp, Purple reef lobster, hermit crabs, various mollies..... live rock and bristile worms.
I have had this set up for about 2 years all going well, have had absolutly no die off....
the mandrian and sea horses eat the baby mollies and the extra babie mollies usually get introduced to my large preditor tank to control the mollie population