Hand Feeding My Discus Fish

Hand feeding my 6 discus fish in their aquarium. The tank is a 260ltr Fluval Osaka aquarium with a fluval 305 filter returning over a spraybar. I have 1 or 2 300w heaters in the tank, dependant on the waters temperature stability. IMy discus are a mosaic leopard, penang eruption, white butterfly, 2 pigeon bloods and a tiger snakeskin. They are eating defrosted beefheart. These fish are in my opinion, the most beautiful and rewarding tropical fish to keep and in my experience are not as …