Who Gives A Fish Forums

Thanks for the advice, everyone. I'll try the beef heart mix and see how it goes. Appreciate the tips on water changes and filters too.

My juvenile Discus aren't growing as fast as I expected. I feed them twice a day with frozen bloodworms and Hikari pellets, but their growth seems stunted. Water params are good, 0 ammonia, 0 nitrite, nitrate under 20 ppm. Tank is 75 gallons, temp at 86°F, with a canister filter and weekly 50% water ...