I feed dog and cat food to my fish with no issues,,to offest the cost of feeding monster sized fish.. My only suggestion if not eaten immediately remove uneaten nuggets ....oil film on water
here's what I feed to my catfish and ciclids on a supplementary basis..
Protein: 25% Fat: 15%
Calories: 3,600 kcal/kg (360 kcal/cup) Calculated Metabolizable Energy
Available in 5lb, 15lb and 30lb bags.
Ingredients
Salmon, ocean fish meal, sweet potatoes, potatoes, canola oil, salmon meal, smoked salmon, potato fiber, natural flavor, salt, choline chloride, dried chicory root, tomatoes, blueberries, raspberries, yucca schidigera extract, dried fermentation products of Enterococcus faecium, Lactobacillus acidophilus, Lactobacillus casei and Lactobacillus plantarum, dried Trichoderma longibrachiatum fermentation extract, vitamin E supplement, iron proteinate, zinc proteinate, copper proteinate, ferrous sulfate, zinc sulfate, copper sulfate, potassium iodide, thiamine mononitrate (vitamin B1), manganese proteinate, manganous oxide, ascorbic acid, vitamin A supplement, biotin, niacin, calcium pantothenate, manganese sulfate, sodium selenite, pyridoxine hydrochloride (vitamin B6), vitamin B12 supplement, riboflavin (vitamin B2), vitamin D supplement, folic acid.
http://www.tasteofthewildpetfood.com/products/dogs/pacific_stream_canine_formula/