HEY! Just thought I'd give you an update on my tank since you gave me all good advice and it is really paying off! I bought some Stability the other day and have used it for 2 days now.
I just tested the water and ammonia is at 0.1!! So it definitely dropped down and now I'm seeing really high nitrites so I'm using Prime to detoxify it. Seems to be working as all fish are lively and no signs of stress. Panda cories look great too and are little piggies.