I did not breed these myself, I purchased 35 fertilized eggs. They were laid on June 28th I believe (at least late June) and they all hatched. Unfortunately I lost a few along the way, but I have 28 strong crushing blackworms and brine nauplii. I "incubated" the eggs at room temps in my basement around 72-75F and they all hatched within 3 weeks. They been living isolated in 16oz cups in my basement since. In July temps were consistently 72-75, August 68-70, September 65-68, October 60-62, November 58-60 and currently their water temp is 54F. I was worried it might be too cold, but they keep eating like champs.
I have raised bunches of Notophthalmus, Tylototriton and various frog tadpoles over the years and I have found that raising them individually and at cooler than normal temperatures decreases mortality significantly. They take longer to metamorphose, but they are usually larger and healthier. I almost always have some kind of plant clipping or java moss in the cups to act as a primitive filter, but I just didn't have any with these guys and let it roll. They are incredibly hardy. They get an 80% water change every 2-3 weeks and outside of that I just top off as needed. For water, I just fill a 5 gallon Home Depot bucket with tap water and add a few drops of "fish water conditioner" from Petco.
As far as feeding, I fed them live artemia nauplii 2x weekly for the first month and then tried transitioning them to cyclopeez. Although they ate the cyclopeez like gangbusters, it fouled the water much too quick for my liking so I continued with the nauplii. Month 2 I began feeding a larger quantity of nauplii but only 1x weekly. Around 9-10 weeks I switched to live blackworms and feed them 1-2 worms 1x weekly. I thought I was going to have to slow the feedings way down once temps hit the 50s, but they just kept eating and pooping
So that's where I stand now. Its been a bit over 5 months and they're getting pretty big and darkening up in color. I've almost completed my "newtlet" tank and I'll post pictures once its done. For now, I just have some metamorph critter carriers with sphagnum moss, a bit of water and some cork bark that I will carefully add the "ready" larvae too when it seems like metamorphosis is nearing.
Whew, I went on didn't I? I hope this information was helpful or interesting!