I have a 180g with snowflake eel, zebra eel, dog face puffer, fuzzy dwarf lion, Fox face, clown, niger trigger, yellow and sail fin tangs. I did a w/c yesterday rearranging rocks but found a ton of uneaten food and waste under and on the rocks. I was able to shake most of it off in the waste water. My question is what additions could I add to the tank to help remove this waste before it accumulates like it did. Thanks