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It should have been added with a disinfectant block, or toilet detergent, which is what I have in the toilet bowl that takes a long time to use.
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Is it put in the toilet cleaning detergent?
It's because there's disinfectant in the tank! You can smell the disinfectant water when you flush it!
The toilet bowl refluxed the toilet cleaner water into the water pipe, bai >>>More
If there is a problem with the installation of the toilet water pipe, which causes water to flow back, you can add a check valve to the toilet inlet pipe to prevent the water from flowing back.
It is infused with a powdery substance called sea blue.
The role is mainly disinfection and visual needs. >>>More
The color of the detergent added to the tank is blue, so the water that comes out will turn blue.