Сроду не красила пищу...To combat this problem we decided to ask all residents to check for leaky toilets and faucets and have them repaired ASAP. We are giving the owner a chance to rectify the issue on their own to save the expense of having us make the repair.
We will then wait to receive water bills for approximately two months (end of February) to see if there was any change in water usage. If not, we will make arrangements to enter every unit and repair whatever leaks are found at the owners expense.
Toilet Leak Test #1: Remove the lid on the toilet tank, and pour a small amount of food coloring in the tank to color the water in the tank. If colored water appears in the bowl without flushing the toilet, it indicates water leaking between the tank and bowl.

Куплю на амазоне , если никак иначе нельзя покрасить воду в бачок.
Просто подумала, что, может, кофе или чайная заварка сойдёт?
Или я чего-то не понимаю?