Yellow leaves

[Aspen35]

Hello all. I’m relatively new to plants. I’m struggling to get everything balanced. This dwarf sag has been looking pretty yellow recently, what is the cause? I have jungle Val showing up in a few days, and I want to make sure everything is right before then. I want the dwarf sag to carpet in the front / middle, and the jungle Val to fill in the back. sorry about the dirty sand, my hornwort made a mess!

Something like this)

 

[itiwhetu]

Can you post a photo of your tank

 

[Aspen35]

Can you post a photo of your tank

Um I just took the light off? It smelled like it was burning

 

[itiwhetu]

How long have they been in those positions. Do you ever move them. These plants can take awhile to establish their roots, while they do that their energy is going into roots rather than leaves