Hi Rhonda,
I dont know if this will answer your question but I will try and help.
Peeling is generally as a result of the nails being constantly drying out and also being in water - constant yo-yo effect of wet and dry - hope that makes sense.
Each company has different opinions on natural nail care so mine is only one opinion based on the training I have had.
I use Jessica treatments which treat the nails according to their condition - dry, brittle, damaged, peeling etc.
A lot of the "nail hardener/strengtheners" are really only to be used until the nails get to the hardness you want then cease using as the nails will become brittle. These products work by taking moisture out of the nails thus hardening them up - too much moisture loss will result in brittleness.
I understand Nail Envy to be a good product - not used it myself - but it should be supplemented with a good cuticle oil - Solar Oil, Phenomen Oil, Avoplex etc.
I was also taught to file the nail in one direction and then bevel the free edge to close down the layers. When varnishing cap the free edge with all layers - this will hopefully reduce any posibility of the varnish peeling from the free edge and peeling layers of nail.
I also feel it is important to keep a covering on the nail at all times - even just a clear varnish as it helps to reduce moisture loss.
Good luck and I hope this helps somewhat.