river system set-up

ok guys this is my plan.

i have a new tank which is 5ft long by 5 foot deep.
it has a fluval 4plus filtration system ready and working
and four bright t5 bulbs

i have also added a "newave high circulation pump 2000"
for the added current to make it into a river system type of set-up.

in the tank so far i have a very small goldfish of around 2 inches and a ghost carp of around 3 maybe 4 inches.
soon i am hoping to add a few roach, rudd, and mayb even some small perch

can you name any plant that they will ignore and not want to eat.
at the moment i have spiral spiralis all along the bck of the tank which are doing ok.