Robelle 25-Pounds Premium Pool Calcium Up

Purchased for pool maintenance and works good.I,ve bought ROBELLE chemical items before and there has never been any problems.It dissolved well and helps keep the water in balance.

This works the same as when I use bioguard. I wanted to see if there was a cheaper version out there and this is it it literally works the same has the same measurements at most pool chemicals including bioguard. I recommend this if you don't want to pay top dollar for name brand

Works well. Shipped fast. Decent price.

Improper water hardness is problematic for pool equipment, and if your issue is it's too low, this is an inexpensive fix with almost immediate results. I would recommend taking a water sample someplace that does free testing (almost every pool store) since this is one thing the at home testing steps aren't accurate on.

Have purchased this calcium several times. Much better price than local pool store & delivered in 2 days. Dissolves quickly, yet packaged securely.

Working great, exactly as advertised. I followed the simple directions on the box to determine how much to add. Made sure to pre-dissolve in a 5gal bucket with pool water before pouring it in my pool. Measured before and after calcium levels, and the increase was exactly as expected from the directions. I am very pleased with this product. I will say, the full box was only 20LB total so I am doubting the 25LB advertising but maybe it was just mine.

This product worked great and was easy to use.

The calcium hardness comes in a heavy duty plastic bag, I prefer my pool products in buckets, so I just dumped the whole thing in my old bucket.There is no odor or spill, but I guess that really depends on how well your package is delivered to you.Calcium dissolved quickly without causing cloudiness or odor. Helped balance my pool!