But I'd suggest that you set up your tank, buy a filter, cycle the tank, and put the tadpoles in it. They may very well be fine for now in the tank you currently have them in, but sooner or later, the more they develop, the more room they will need to themselves.
In most circumstances, the executor is the representative of the estate for all purposes, and has the ability to sue or be sued on behalf of the estate. The executor holds legal title to the estate property, but may not use the title or property for his/her own benefit, unless permitted by the terms of the will.
Choosing an executor -- the person or institution you put in charge of administering your estate and carrying out your final wishes -- is one of the most important decisions you'll make when preparing a will.