The Festivum is fine with the discus. But when I feed frozen food cube I need to hand feed them so that the Festivum will not eat it all. I hand feed to makes sure everyone gets a full belly. Beside him being a pig he is a good tank mate. He thinks he is a discus.
I have Cory cats and just a few random tetras that are basically leftovers from another tank were most became food. I also have a bn pleco. my tetras stay out of the discus way when foods around
My red snakeskin is the perfect example of a poor quality lfs discus. Poor guy will not grow.
80gal
8 discus 3-5" in size
6 random tetras
7 Cory cars
1 Festivum 5" ( I might move him to another tank so I can keep plants)
1 bn Pleco 3" female
I love the Cory cats and think they are great for cleaning up beef heart bits. You should keep them.
Festivums are big time plant eaters and will not hunt down tetras. Mine is 5.5" over a year old and still growing. He never has touches the smaller fish. Now my sword plant that's another story.
Your very lucky, if your festivum wasn't so well fed you would honestly find a tetra vanishing from time to time, either that or he's a strange one lol, not saying you have made a bad choice but its true, festivums can and have eaten tetra, I had a good look into tank mates when I had a Discus set up 4 - 5 years back.