Discus do jump. It happened to me before. I have had a Cory and a tetra jumped as well.
My tanks are all topless.
That being said when pairs were forming and I had 10 fish in one tank 2 did jump out .
I think they jumped from the pairs behavior but there are many accounts from others that have lost fish dur to just jumping .
Another [ unsightly ] trick to curb jumping is lowering the water level .I use this with my swordtails as they too jump especially when males are aggressive and I have not lost any since .
Low water is not pretty though .
Egg crates or a DIY screen top will work .
Just for ideas I will link BRS screen top ;
https://www.bulkreefsupply.com/sumps...reen-tops.html
Discus do jump. It happened to me before. I have had a Cory and a tetra jumped as well.
My tanks are all topless. I do use screen tops at night in case the discus want to jump. My tanks are in a room in my house where I can view them off and on all day. I never liked dealing with tank lids. Just my preference.
Bud
I'm with you Bud.
Aquarium tops have always annoyed me.
I am rethinking the statement I made when I called my tank topless.
It really is not
It is 30x36"
There are two, side by side, 14x14" square holes in the middle.
The rest is covered.
The two holes have a LED light bar over them.
I do think, however, that next time I am at the hardware store I will pick up some egg crate for night time.
I used that stuff a lot in the salt water hobby
VincenZ0
Just use a mesh cover guard like you can get for marine tanks