Liquid pods for recirculating water systems

1. A liquid pod for recreational water treatment comprising a liquid composition disposed within a packet comprising a water-soluble polymer film;

wherein the liquid composition comprises:

(i) 40% water and 60% sodium hexametaphosphate by weight;

(ii) 24% diacetone alcohol, 24% ethylene glycol monoisopropyl ether, 32.6% propylene glycol, 15.4% dipropylene glycol, and 4% polydiallyldimethylammonium chloride; or)

(iii) 48% diacetone alcohol, 32.6% propylene glycol, 15.4% dipropylene glycol, and 4% polydiallyldimethylammonium chloride.

2. The liquid pod of claim 1 , wherein the water-soluble polymer film comprises a composition comprising a polymer, and, optionally, an additive.

3. The liquid pod of claim 1 , wherein the water-soluble polymer film comprises a polyacrylic acid, a polyacrylic acid copolymer, a polyacrylamide, a polyacrylamide copolymer, a polyvinyl alcohol, a polyethylene glycol, a polyamine, a polyethyleneimine, a polyinylpyrrolidone, a polyinylpyrrolidone copolymer thereof, a cellulose, a cellulose derivative, or a combination thereof.

4. The liquid pod of claim 1 , wherein the water-soluble polymer film has a thickness of about 1 to about 5 mil.

5. The liquid pod of claim 1 , wherein the water-soluble polymer film as a thickness of about 2 mil or about 3 mil.

6. The liquid pod of claim 1 , wherein the liquid pod comprises liquid composition (i) and has a density greater than the density of recirculating water.

7. The liquid pod of claim 1 , wherein the liquid pod comprises liquid composition (ii) or liquid composition (iii) and has a density less than the density of recirculating water.

8. The liquid pod of claim 1 , wherein the liquid composition has a viscosity of at least about 200 cP.

9. A method for treating a recirculating water system, which comprises adding the liquid pod of claim 1 to the recirculating water system.