i have a 45 gallon tank with a 8 inch snowflake eel, toby puffer fish, and a golden maroon clownfish. i have a cannister filter that filters up to 100 gallons and a powerhead with another filter attached along with a remora protein skimmer PLUS weekly water changes so dont tell me im over stocked because im not, so my question is im looking to add one more fish and i want it to be a fish that will sift my sand and eat the remaining food out of it, i know the gobies are good for this, but i was wondering if their was another fish that will be safe from snowflake eel that could do the same job?