It burned out my float too, even though I did everything the instructions said. Be careful guys... you try to remove the limescale and you end up causing even more damage

It ruined two built-in cisterns for me!!! I need to buy new float valves! Be careful!!! And one button turned blue inside and we cleaned it

I saw that it foamed, I smelled its chemicals but it didn't do the job...

I have a built-in GEBERIT flush tank, 3 years old, which has a small leak.
I read that this product removes the limescale that causes the gaskets not to seal properly and decided to try it.
I followed the instructions exactly and even noticed that in Greek they are not clear, so I followed the English ones. So, the instructions are also poorly translated.
So I let it work but nothing happened. The leak continued.
After 2 days, reading online, I found the solution of white vinegar (€2.98 for 4 liters) and I put about 1.5 liters and left it overnight.
The next morning the leak stopped!

I can't draw any other conclusion than that vinegar, which is cheaper and non-toxic (clearly stated on the product label), is better as it is cheaper and more effective.