Spoiling your water as in all the blood and crap going into your water along with the worm. Those "juices" dont do anything except spoil your water, might as well do it like the OP, cut it in a container of water, and throw in clean worms. Another thing I found out about hydroponics is, its a double edged sword. Yes it does keep your water clean, and it does minimize your need for a water change, but in doing that, you stop replenishing staple nutrients that come out from your tapwater in your water changes.