Going on hoilday for two weeks whats the best method for feeding my fish

Hi , i'm going away for two week , i live on my own and do not want to give
the neighbour my keys etc , so whats the best method , i've seen the food
blocks that slowly dissolve over a period of time , will these do the trick
? my tank is a rio240 , so its not small tank its set up for tropical and i
have about 14 fish in there , 9 are small fish , 3 are medium and 1 large
parrot fish around 7 - 8 inches long , they all get along just fine etc ,
if the blocks are a suitable option , then how many should i buy ?

I was going to ask my local pet shop tommorow , but i find its usally best
to ask the consumers advice first and ask the seller afterwards , its a good
pet shop , but joe publics opinion is usally the best.

Or should i over feed the fish for the next few days and will they be okay
for two weeks with out feed (which i doudt) but i thought i would ask.