AmmoLock etc are not ways to remove ammonia from toxic levels. You limit water changes when you are doing what is called a "fish-less" (or in this case "frog-less" cycle). When you have living creatures in the tank, it is cruel to subject them to toxic levels of ammonia which burns their skin in order to make the cycle happen faster for the tank owner.
The frog's well being is the main concern here, so clean water is of the highest level of importance. I am sure the tank owner does not mind doing more frequent small water changes in order to give the frogs healthy water.
And to the thread owner - - Do you treat your water? You can buy water dechlorinator that removes the chlorine with in a few minutes, rather than having to let the water sit out for long periods of time. It is fairly cheap (less than $10) and one bottle lasts me with 6 tanks MONTHS.
The frogs will get use to their light - they have no eyelids so when you first turn it on it will startle them, but they will settle in quickly. Can't wait for pictures of their new home!