Make sure you are trimming the dead or dying leaves. You could run CO2 every day (watch your lighting, if it's not high light the CO2 doesn't really help you much).
It is normal to have some melt and re-growth with big changes. I had a beautiful anubias petite that was doing really, really well until it changed tanks. Then it all melted, and I trimmed it up. It's now growing brand new thick leaves that look very healthy.
I blame spelling mistakes on my iPad. You should too!