Before putting in frogs, put in some natural waste processors.
I always graft my soil with springtails and woodlice,
they will brake down the waste and fallen off leafs and stuff like that while being a constant foodsource for the frogs as well.

Best is when you set your tank up, add them into it and just let everything balance out before putting in frogs.
You will have the time to let mosses grow and let the plants attach nicely.
Checking and changing of the RV and temp. can be done in this period as well.
As soon as you feel everything settled it's time to get you're frogs in there.

Altough, i see that this is not a common method used around the US.
Where i'm from it's the guideline for every starter.
Once everything found it's balance you won't be in need of changing and cleaning substrates everytime, since by doing so you automaticaly you stress out the frogs as well.
Frogs will be happiest when left alone