Applied Biochemists Resist 406803
No Testing Required! Resists against stains and scale forming by preventing the minerals in the water from reacting to create stains and scale. Used during pool filling and on a regular maintenance schedule, this long-lasting sequestering formula prevents damage to equipment and pool surfaces typically caused by stain and scale formation.Features: Long lasting protection against stains, scale and rustPrevents colored waterProtects equipment from corrosionNo testing is required.Applications:Normal:Use 16 oz. RESIST per 10,000 gallons of pool water. For hard water, (over 200 ppm), high iron, copper or manganese content (over 0.1 ppm), double the initial dosage (32oz. per 10,000 gallons).Add RESIST after the pool has been filled. Filled pool should then be circulated overnight before adding chlorine or other pool chemicals to allow RESIST to react with and prevent precipitation of minerals in fresh fill water.
Please be advised that certain manufacturers - including Pentair® (with their TradeGrade® products), Jandy®/Fluidra® (with their Trade Series Exclusive™ products), and Hayward® (with their Expert Line® products) - do not honor manufacturer warranties on specific product lines purchased online.
These policies are intentionally enforced by the manufacturers to prevent customers from purchasing the same products at lower prices online.
Warranty coverage for these products is generally only available when purchased in person from an authorized local dealer.
While we strive to take care of our customers by offering the lowest possible prices on brand new, genuine products, we do not provide warranty coverage ourselves, nor can we guarantee that the manufacturer will honor the warranty on products purchased from our online store.
It is the buyer’s responsibility to confirm warranty eligibility directly with the manufacturer before making a purchase.
If you are a local customer, you may be able to purchase these items in-store and obtain manufacturer warranty coverage. However, for many of our customers across the country, paying significantly more locally just to access a manufacturer warranty often doesn’t make financial sense, especially when some local suppliers charge considerably higher prices.
By completing your purchase, you acknowledge and agree that we are not responsible for warranty support or claims denied by the manufacturer due to their online sales restrictions.


Denise V. –
Quality product
Justin J. –
Quality product
Aria Alexander –
I can always rely on them for fast delivery.