Customer Support
Poolweb Essential Chemicals Chlorine sku: C004809-CS20P5
Assault 73 - Shock and Algaecide - 1 Lb.
  • Assault 73 - Shock and Algaecide - 1 Lb.

Assault 73 - Shock and Algaecide - 1 Lb.

By Haviland
Poolweb #C004809-CS20P5
79 in stock and ready to ship
$10.14 $10.14
Unit price per 

Order in
and it ships today!

Shipping Options (more information)

  • Standard Shipping, $6.95 Get it by
  • 2 Day Shipping, Get it by
  • 1 Day Shipping, Get it by

Shopper Protection

Product Overview

Product Files

Description

This is a 1 pound bag of chlorine and algaecide that provides a rapid source of chlorine-containing disinfectant. This calcium hypochlorite product is a dry granular, free flowing material that contains a minimum of 70% available chlorine. Calcium Hypochlorite disinfects and protects the pool water against growth of bacteria and algae.

Active Ingredient of this Assault 73 Shock and Algaecide: 73% Calcium Hypochlorite.

Directions for Adding Assault 73 Shock to your Pool for Shock Treatment:

First, adjust pH between 7.2 and 7.4 prior to shocking or superchlorination. Add this product at night or when the pool is not in use. Add 5 ounces of Assault 73 per every 5,000 gallons of water to yield 5-10 ppm available chlorine. You can add product by broadcasting the granules over the pool water surface at the deepest end with the pump running. Do not enter the pool until the free chlorine residual has dropped to 4.0 ppm or less as measured using a suitable test kit.

Directions for Adding Assault 73 for Routine Chlorination:

To prevent problems, shock at least once per week during periods of heavy use or when water temperatures are above 80 Degrees F and once every two weeks in residential pools receiving normal usage. Add 3-4 ounces of this product (1-2 ounces in stabilized pools) per 5,000 gallons of water daily or as often as needed to maintain the desired free chlorine residual whether the pool is in use or not.

Features

  • Dry granular calcium hypochlorite
  • 70% available chlorine
  • 73% Calcium Hypochlorite
  • 27% Other Ingredients

Technical Specifications

Poolweb Item #C004809-CS20P5
ManufacturerHaviland
Lead Time48 days (if out of stock)
Shipping Weight1.0 lb

Troubleshoot Your Water

  • Cloudy Water
  • Green Water
  • Brown Water
  • Eye Irritation
  • Chlorine Odor
  • Calcium Scale
  • Metal Corrosion

Cloudy Water

Cloudy Water CausesSolutionPreventive Measures
High pH Bring your pH into the desired range of 7.4 - 7.6 ppm. Maintain a proper pH level by using Haviland pH Reducer.
Dirty Filter Check filtration system. Backwash if necessary. Use Haviland Liquid Filter Cleaner each spring and fall.
Low Free Chlorine Residual Bring free chlorine into desired range of 1 - 3 ppm. Shock if necessary. Maintain a proper level using one of the Haviland chlorinating products.
High Total Alkalinity Test total alkalinity and adjust accordingly Lower total alkalinity to their ideal levels using Haviland pH Reducer.

Green Water

Green Water CausesSolutionPreventive Measures
Green Algae (hazy water) Shock the pool using chlorine based shock at 1 lb. per 10,000 gallons. Let circulate overnight and then adjust free chlorine residual to 1 - 3 ppm. Add Haviland Algae Kil 50 or Haviland Combat 60 every other week at a rate of 6 oz. per 10,000 gallons
Copper in Fill water (clear water) Use Haviland Rust-N-Scale at a rate of 6 oz. per 10,000 gallons. Let circulate overnight before adjusting chlorine or pH. Add Haviland Rust-N-Scale every other week at a rate of 6 oz. per 10,000 gallons to prevent stains due to copper in the water.

Reddish Brown Water

Red/Brown Water CausesSolutionPreventive Measures
Dissolved Iron or maganese in water Adjust pH to 7.4 - 7.6 range. Use Haviland Rust-NScale. Let pump run continuously until clear. Add Haviland Rust-N-Scale every other week at a rate of 6 oz. per 10,000 gallons.

Eye & Skin Irritation

Eye Irritation CausesSolutionPreventive Measures
Combined Chlorine (chloramines) level too high Shock the pool using one of the Haviland shock treatments. Let circulate overnight and then adjust free chlorine residual to 1 - 3 ppm. Shock treat every other week, after heavy use or rain. Test for free chlorine residual daily
pH level too high or too low Adjust pH by using Haviland pH Increaser or Haviland pH Reducer to bring pH level to ideal range of 7.4 - 7.6 ppm. Test pH level daily and maintain pH in 7.4 - 7.6 range.

Chlorine Odor

Chlorine Odor CausesSolutionPreventive Measures
Combined Chlorine (chloramine) level too high. The cause is NOT too much chlorine but not enough free available chlorine Shock the pool using chlorine based shock at 1 lb. per 10,000 gallons. Let circulate overnight and then adjust free chlorine residual to 1 - 3 ppm. Test pH level daily and maintain pH in 7.4 - 7.6 range.

Calcium Scale Formation

Calcium Scale CausesSolutionPreventive Measures
pH too high/Total Alkalinity too high Add Haviland pH Reducer to bring pH into 7.4 - 7.6 ppm range and to bring total alkalinity down to 100 - 175 ppm. Maintain pH level in 7.4 - 7.6 range. Maintain total alkalinity level in 100 - 175 ppm
Calcium Hardness level too high If hardness level is too high, some water may have to be drained. Add Haviland Rust-N-Scale per label directions. Add Haviland Rust-N-Scale every other week at a rate of 6 oz. per 10,000 gallons.

Corrosion of Metal Parts

Corrosion CausesSolutionPreventive Measures
pH too low/Total Alkalinity too low Add Haviland pH Increaser to bring pH into 7.4 - 7.6 ppm range. Maintain pH level in 7.4 - 7.6 range. Maintain total alkalinity level in 100 - 175 ppm.
Calcium Hardness level too low Add Haviland Water Hardness Increaser to raise the calcium to 180 -275 ppm. Maintain calcium level at 180 -275 ppm.

Shipping & Returns

Shipping Options

Standard Shipping $6.95 Get it by
2 Day ShippingGet it by
1 Day ShippingGet it by

Standard ground shipments may be delivered sooner depending on where you are located, and the shipping method used to ship your order. Combining multiple items onto the same order can change the delivery date and expedited shipping costs, especially if the other items are not available for immediate shipment. Transit time is calculated in business days and does not include Saturday and Sunday.

Due to significant demand on swimming pool parts and equipment, we cannot guarantee out of stock items will be available for immediate shipment. If your order must arrive to you by a certain day, please contact us first and we will provide you with a more definitive shipping and receipt of your order.

Returns

This item can be returned within 30 days of order. See return policy for details and how to place a return.

We Also Recommend...

Product Reviews

Customer Questions

Part Finder

Select Brand

Select Product