Thanks for replies.
My carpet plant is Dwarf Baby Tears. Believe or not, but I started out with once small bush about 2" diameter and divided up into 5 small clumps. Tied each clump to a rock and pushed the rock into the substrate. That was on October 28, about 5 weeks ago. Now each of the 5 are bigger than the one I started with. At this rate, I'm hoping to have a complete carpet soon.
In regards the Rummy nose and tetra, I've had 10 Rummy nose and 1 Cardinal Tetra since Boxing day 2014. Haven't lost a single one. This boxing day will be 2 years. As well, as you probably noticed, they are very active and seem extremely healthy and happy. I wouldn't add more, but in all honesty the amount I have seem to be really thriving.