I have an external rena canister filter and i've been feeding my fish live blood/black worms. the intake appeared to take some of the live blood worms in. should i worry about this? will something grow in the filter and should i consider cleaning the filter? also, i forgot to put the bloodworms back in the fridge and the bloodworms died overnight. is it still safe to feed the fish with dead bloodworms? i know frozen blood worms are obviously okay. but what about live ones that i just forgot to put back into the fridge?