SpeedyBright Biodegradable Descaler/Limescale Remover, (2) 1/2 Gallon Bottles

Great household descaler for my HVAC systems

Works fantastic and quickly! I had been flushing my on demand hot water heater with simple house vinegar, as recommended by so many folks and professionals, but... I kept having issues with my unit and it would plug back up within two months. I have very hard water. I had a heat sensor go out - had a chunk mineral deposit stuck to it, after flushing it. Had the temp sensor stop working - had mineral deposits stuck to it, after flushing it. The pro who troubled shooted my unit used this product and resolved this sensor issue and got way more crud out of my unit. Wow what a difference in water flow and water pressure! Even ran it through the hot water main line to my kitchen sink and wow again, flushed out all that build up in that line and now I have excellent water flow from the hot water tap too. So, I ordered this for my personal use from now on! Just as easy to use as vinegar, just need to be a bit more careful as this is a strong acid. Ordered this and it was shipped quickly and arrived in a few days, which I was skeptical about, but this company has proven it can ship fast and package products extremely well. Will order again (this product is hard to find in my area).