My plant used to be growing vibrant and healthy and as of recent it seems to be deteriorating. Over two weeks ago I separated out one of the three spider plants because the plant was becoming congested and also I changed out the soil at that time. Is there something I did wrong or does anyone have any advice for me to save my plant

Here are my pops dimensionsthe soil that I use

Height (in)
25.98
Container Length (in.)
13.58
Container Width (in.)
13.58

Miracle grow potting soil

...here's before and now current Pictures