I'm so grateful for this forum. Good point about the smaller tank! You know, I've given serious consideration to moving them in the last week or so and I don't mind the water changes. However, I spent all my "hobby money" (I'm saving for a wedding in 8 months) on the setup I currently have. I'll have to wait another day or two before I have the funding to purchase a smaller tank. Nothing fancy, just enough to keep them healthy and happy.
And I'm glad someone mentioned the lighting. That's a really important thing to remember in terms of temperature regulation and because these poor little creatures have no eyelids. Can you imagine how uncomfortable it would be to stand under department store lighting for hours with no eyelids? It's a very good point. And my answer is no, I do not use the lighting often. I turn it on occasionally to take pictures (it makes it much easier to photograph them at night) and recently, I began using it when I feed them. Axolotls are smart and they learned quickly that light means worms. Another useful way to help with the feeding process. Also, I should clarify that the room that houses their tank is ordinarily very bright. Unfortunately, it's also our bedroom. We caved and bought curtains that block out 98% of light, draft and sound less than a week after moving in. Lol. And that was years before the axolotls came along. So, three of those five pictures were actually taken during the day after simply pulling the curtains back. Fortunately, between the axies and my fiance's 3rd shift job, the curtains are almost always closed.
And I finally understand what you mean about the rocks. In spite of their current size, it's quite possible that they'll be dangerous in the future. I've seen a full grown axolotl swallow a goldfish about the size of those stones before. And you know, it's funny because I did so much reading and planning before even thinking I was qualified to bring any home and care for them. Yet, after all this planning, I managed to provide them with an adult sized tank that has rocks in it which are only safe for babies.

Who knows what I was thinking.
So, now my question is this: Is there any particular kind of sand that you would recommend using inside the smaller tank? Or do you feel it doesn't make a difference? Thank you all again for your time.