Rannai tankless water heater de-scale

[Westbrooklawn]

I'm going to descale my water heater. I have the necessary hoses and pump. What is the BEST de-scaling solution you can buy. I know white vinegar is often suggested, but I'm sure there are better solutions that the professionals use.

 

[SHEPLMBR]

https://www.oatey.com/products/hercules-haymaker-tankless-water-heater-descaler--78801589

 

[breplum]

I think that any name brand descaler solution is fine.
Local plumbing supply shops are a potential source.