That´s an impressive post! However, i would like to point out a couple of things so that there is no confussion.
First, live plants are not an automatic cycling trick. I´m a huge defender of using lots of live plants instead of filters, but let´s not get carried away....in order to work properly, the tank must be cycled. As you say, plants take ammonia and nitrites, although in small amounts. The true factory of ammonia and nitrites processing are the bacteria. Once the tank is cycled, they will cover every submerged surface, including all the available surface that the plants provide. This is what makes it work, because the combination of the biofilm and the live plants acts as a natural filter.
Although the impact of ammonia and nitrie levels will be partially tamponed by the plants, you can´t expect an uncycled tank to be stable and safe just because you have plants in it.
Additionally if you have lots of plants you don´t really need a filter, and if you have a filter, then you don´t need an airstone, let alone two.
The other point is the food. Tuna, clams, silversides, crabs, and very specially vegetables are not suitable foods for any caudate. Salt water animals are inadequate because of the radically different osmotic contents. Parts of fish, instead of whole fish, are a poor choice since they are nutritionally incomplete, and they have trouble digesting vertebrate meat anyway.
The vegetables are a serious danger. ALL caudates are strict carnivores. Vegetable matter can indeed cause problems, plus it adds absolutely nothing to the nutritional value of their diet.
Your suggestions sound absolutely ideal for turtles, but do not apply to axolotls or other caudates, so please, be cautious.