Bio-Dex #300 Tile Cleaner, 1 qt. BD300

I have white scale buildup all around my pool that has glass tile. See pictures, but brush it on with a paint brush let it sit for like 5 min then I scrubbed with a small wire brush that connects to the end of my pool handle. For heavy scale buildup up you will need to do it a few times.

Didn’t remove calcium like we hoped and read about.

I have white tiles. Brown calcium line , with brown in-between the tiles in the grout. I rubbed this stuff on with a paint brush, taking my time and going in a different directions. It took me about an 2 and a half hours to just do the spa but man it looks good. It takes time and elbow grease, but it does the job for sure. I'll probably do this semi-annualy so the next time I dont have to rub as long.

Works as designed, needs time to work, be patient.

I purchased two bottles of this as I have a fairly large pool, and I live in Brentwood, Ca. We have very hard water (over 30 grains per gallon hard) and our pool had developed a pretty significant ring of calcium deposits around it. It looked bad, and I thought this stuff would help get rid of the hard water deposits around the pool. I followed the directions, and started working on one corner of the pool... 4 hours later, I gave up with this stuff. This product not only did nothing to loosen the deposits, the main thing it did was bleach the deposits super white... So after 4 hours of hard labor, my pool looked significantly worse than when I started. That was a fun Saturday! Seriously, Biodex 300 did absolutely nothing to clean up the tile... I have since gone back to Muriatic Acid and a straight razor blade gasket scraper... That sucks, but at least it works. I have spent quite a bit of time, and I am not done yet... But at least I am making progress! The Biodex 300 made absoluely no progress at all... My wife was almost crying when she went out to see how it was coming along and she saw the super white deposits left behind after I had worked for hours with the Biodex... Save your money... This stuff sucks worse than any product I have tried in years...

Took off paint on my tiles.

This worked like a dream on the lime scale and calcium deposits in my bathtub. I wish I'd taken a before and after photo. Works well on bathtub tile too!

I had hard water Calcium build up on my pool tiles. I had to also use a pumice stone to help the process alittle bit to scrub it off. But this product made the scrubbing not so bad. It did most of the work but not all of the work. I had to scrub aliitle bit. My Calcium build up was pretty bad. I have used just a pumice stone on my pool tiles before WITHOUT this product, it was exhausting!!! This product helps you not have to scrub so hard, helps to loosen up the Calcium build up. I would definitely buy this product again!!