Really want to say this again.
And it not about getting the most expensive. Set yourself up with what you need worst case scenario. If all your rez water leaked out, what stopped it. Water is the god damn worst. Since you live in an apartment, check your lease and renters insurance. If you need to call to ask say you have a xxx gallon fish tank. You don’t want to find out after you have a leak, that you aren’t covered, or aren’t allowed.
I use water sensors too. They are very inexpensive and I think about them as often as I do the smoke detectors.