Pool chemistry

Trichlor shock tablets dissolving in a skimmer basket of a backyard vinyl liner pool with cloudy water visible

Trichlor Shock for Chlorine Lock in a 15,000-Ga...

You've added shock, waited overnight, tested the next morning, and the chlorine reading is still stubbornly close to zero. If that cycle sounds familiar, you're almost certainly dealing with chlorine...

Trichlor Shock for Chlorine Lock in a 15,000-Ga...

You've added shock, waited overnight, tested the next morning, and the chlorine reading is still stubbornly close to zero. If that cycle sounds familiar, you're almost certainly dealing with chlorine...

Fresh white pool plaster being troweled smooth inside an empty in-ground swimming pool by a worker

Pool Plaster Cure Time: When to Fill and When t...

You just watched the plasterers pack up and drive away, and now you are staring at a beautiful, chalky-white shell that you desperately want to see full of water. The...

Pool Plaster Cure Time: When to Fill and When t...

You just watched the plasterers pack up and drive away, and now you are staring at a beautiful, chalky-white shell that you desperately want to see full of water. The...

Pool closing supplies including a cyanuric acid stabilizer container beside a covered inground pool in late fall

Stabilizer Level at Pool Closing: What Target A...

Every fall, pool owners spend real money on shock, algaecide, and cover pumps, and then forget to check the one number that quietly determines how hard spring opening will be....

Stabilizer Level at Pool Closing: What Target A...

Every fall, pool owners spend real money on shock, algaecide, and cover pumps, and then forget to check the one number that quietly determines how hard spring opening will be....

Homeowner pouring bags of pool grade salt into a sparkling 30000 gallon saltwater pool in a backyard

How Much Salt to Add to a 30,000-Gallon Saltwat...

Your salt cell alarm goes off, you test the water, and the readout says 2,400 ppm. Now you're standing by the equipment pad wondering how many bags to haul from...

How Much Salt to Add to a 30,000-Gallon Saltwat...

Your salt cell alarm goes off, you test the water, and the readout says 2,400 ppm. Now you're standing by the equipment pad wondering how many bags to haul from...

Calcium hardness increaser being added to a 20000 gallon fiberglass pool with blue water reflecting sunlight

Calcium Hardness Increaser for a 20,000-Gallon ...

You test your fiberglass pool water and the calcium hardness reading comes back at 50 ppm. The strip or test kit is not broken. That number is just genuinely that...

Calcium Hardness Increaser for a 20,000-Gallon ...

You test your fiberglass pool water and the calcium hardness reading comes back at 50 ppm. The strip or test kit is not broken. That number is just genuinely that...

Bottle of muriatic acid being poured into a 15000 gallon saltwater pool near the return jet on a sunny day

Muriatic Acid for a 15,000-Gallon Saltwater Poo...

Your saltwater pool has been humming along all summer, and then you test the water and see pH 8.0 staring back at you. It happens fast this time of year,...

Muriatic Acid for a 15,000-Gallon Saltwater Poo...

Your saltwater pool has been humming along all summer, and then you test the water and see pH 8.0 staring back at you. It happens fast this time of year,...