[New Discus Journal]

Nice, you seem to be feeding them the best there, what % and frequency are your water changes, do you age the water and warm it before adding to the tank?

[New Discus Journal]

Thank you, I grew them out, I can not recommend the Stendker colour good heart enough and plenty water changes, they was all purchased at 8 cm from UK Stendker retailers.

I do believe that the water changes stop the build up of the growth inhibiting hormones.

[New Discus Journal]

I am in the UK, I have been doing exactly the same as you, I recommend feeding the Stendker goodheart beefheart a couple of times a day, the best advice I can give you is feed and water changes, I would do 30-40% every other day if you can, it stimulates the growth, I use a HMA filter for water changes, with good feeding and frequent water changes, keep them warm they will colour and grow better, less chance of a stunted Discus…Good luck.

https://aquariumscience.org/index.php/7-filter-media/
 

This website has saved me a fortune I have a filter full of pot scrubbers and a filter full of 30ppi foam from Swiss Tropical I had it shipped over, have a read through all the chapters it is brilliant advice.