Wanting to use an underwater pool sander to sand some tiles in pools as they have a very hard and thick layer of calcium built up on them is a common phenomenal in the lives of swimming pool owners.
I tried a basic sanding paper on soft spots but boy was that some hardwork so I opted out to try some pneumatic wet/dry polisher underwater, after lowering the water 2 inches to avoid water prolusion.
I will be sharing some tools that I found helpful below:
ALSO SEE: Muriatic Acid Storage Containers
Table of Contents
How to Sand using Underwater Pool Sanders
Cheap Options (Takes more time and can be harder)
Lower the water level and use Duluted muriatic acid (BUY ON AMAZON)
Using a metal brush (BUY FROM AMAZON) from your local store or Amazon
More Expensive Options (but Quicker Results)
Here are some pneumatic wet/dry polisher underwater (SHOP ON AMAZON), using scuba that works great!
BOSCH 1994-6 9-Inch Large Angle Grinder
This angle grinder is a beauty to behold! It packs loads of power and cuts through concrete with minimal efforts. It is simple to operate and comfortable in the hands thanks to its anti-vibration features. I am happy with the results after trying out this product.
The only downside is that it does not come with a case. So, I got a 28″ wide Dewalt/Stanley tool box case and the grinder fits very nicely inside.
Mirka MID55020CAUS Direct Electric Random Orbital Sander, 5-Inch
The sander is great but might need some getting used to. Formerly, I used an electric to air powered sander I got from my neighbor but it resulted in a nerve damage from vibration.
This is a much better improvement over electric sanders, but needs a 7 HP compressor to run them and dual hoses if you wanted to vacuum.
It is almost silent when running and is smooth as silk, dustless if you need it to be, and as strong as my air sanders. Its grip is narrower and easier on older hands too.