How much should i be feeding?

[czech it]

heres what i have in my tank
1 occilaris clown fish
1 blue yellow tail damsel
1 massive turbo snail
5 blue leg hermit crabs
1 emerald crab
1 peppermint shrimp(currently being eaten by the crabs mentioned above)
5 Astrea snails
1 cleaner clam( the other was eaten gangbang style)
5 Nassasarius snails
Ive been feeding frozen brine(cubes) and theres algae, waste, and marine plants they forage on but i dont know if they are starving or they just opportunistacally killing when they got the shrimp and clam. so what and how much does anybody recommend to sustain my two fish and crabs.
Thanks for the help in advance.

 

[smallreef]

you could do 1/4 a cube a day and still be overfeeding...
the clam was probably dead or dying which is why the crabs attacked it, and same with the pep... hermits usually only eat dead or dying.. not live and healthy