Sam I bought 8 x 5-6" fish from our newest sponsor Dennis's Discus Fish for my 125 gal BB tank...SO happy with the overall health and quality of the fish from Dennis...I lightly feed beef heart mix & pure deer heart x 2 per day, and do a 50% water change and wipe down all interior surfaces and clean my sump pre-filter sponge every 3 days when I am off work...the fish are happy & healthy, and I have 1 proven pair, and 1 other pair that lay eggs after every wc...I'm loving being back into discus after 15 years!