what size tank would i need??

Hey,

Ok so just wondering what size tank i would need for the following!?

4xSexy shrimp

1xWhite spotted anemone shrimp

2xPorcelain crab

1xPom pom crab

1xPinkbar goby

Astrea snails

BTW would i be able to keep a seahorse with these?? If so how many?

TIA

Also the tank will have mainly LPS :banana::help: