
I dont realy check either but with a Leo and a pup, you better play man to man coverage on those Params big dogg. Especially with that size tank he is in....JMO
Honestly I dont think you should worry about anything.
When I usually get a new tank, I let it sit with no water for a min 48hrs to kill off what ever was in the tank before and wipe the tank down real good.
Then do what you did with some water and a filter from an established tank then tap water and add prime to the amount of water in the tank.
I think as long as the lil guy is eating and acting normal... no signs of ribs or death curl, you should be all good.
Just speaking out loud, if you have a HOB overflow, hook it up and toss a powerhead in the 29gl and use it like a mini sump/temp tank. This way you dont have 30 diff tanks of fish that will end up in the same tank anyway.
Thats my plan with my 300gl, to add a 100gl under it as both sump/grow out tank