Enjoying his new plant and deep water.

If you would allow me to make some suggestions, but I'm going to keep it short, feel free for me to elaborate on anything.
-Increase in water volume so there is at least 10 gallons of water
-Ditch the gravel, it builds up waste and is an impaction hazard, it can be replaced by rinsed fine sand(playsand, pool filter sand, aquarium sand, etc), also can be left bare bottomed, or siliconed down slate, but siliconed slate would have to be done to a dry tank.
-Even more live plants, you can never have too many

What are you feeding as a staple diet?

Thank you for the suggestions. I'm always open to them. I will definitely look into other substrates or just go bare bottom. Their staple diet recently has been live meal worms and frozen blood worms. I just bought wax worms and frozen brine shrimp for them to try and they really liked the wax worms. I haven't given them the shrimp yet. Can you elaborate on more water? I should mention that the other younger newt I have is still terrestrial and I'm trying to make him more aquatic.

Waxworms are high in fat and should only be fed to fatten up a new or as an occasional treat, mealworms aren't a good food at all, they aren't very nutritional and their hard exoskeleton makes them difficult to digest, and they could most like chew the insides of the newt before getting digested. Frozen bloodworms are good for treats too but are also nutritionally incomplete, the staple should be chopped or small whole earthworm, with occasional treats every couple of feedings.
If you want another newt to go aquatic I would recommend putting it in a small tub, with an inch of water and a lot of live plants like java moss and elodea, with increases in the water level every week or two, this is what I do with my hydrophobic H. orientalis morphs and it works well, it may be terrestrial because its stressed from being imported and isn't used to water yet.
More water meaning at least a total of at least 10 gallons of water to be able to keep up with water parameters, live plants + at least 10 gallons of water + spot cleaning + regular water changes would be good, while never doing a 100% water change unless something like a disease breaks out.
Feel free to PM anymore questions bc I don't get notifications from this.