Pool RX Black 20-30k 3 Pack

the product itself works wonderful ... would give it a 5 star from Pool Rx.so ordered the (3) pack because cheaper in bulk as the description implies and am sent a single product. have contacted seller and no response. so hence the (1) star experience

Really helps in maintaining the balance of pool chemistry and keeping algae from forming. Cuts down on having to add additional chlorine and algacide to keep the pool water beautiful and swimable.I use it as a standard spring/summer start up for any of my pools.

These help save chemical costs for your pool. We’ve used them the past 3 summers. BUT, we always have an issue w one of them bursting in the skimmer. Not sure why? I need to call Amazon for a replacement.