BioGuard Back Up 2-Qt two-pack front view for easy shopping.
BioGuard Back Up 2-Qt two-pack in pool setting shows edge dosing.
Close-up of BioGuard Back Up 2 label highlighting algicide and non-staining.

BioGuard

BioGuard Back Up 2-Qt, 2-Pack | Algae Prevention for Pools – Non-Staining & Clear Water

High-performance patio lawn and garden made for confident daily results

$80.81

3 shoppers currently have this item in cart.

Low stock: only 5 left in inventory. Add to cart before it's gone.

Shop Pay installment options may appear at checkout where eligible.

Free shipping Secure checkout 100% refund eligible
Bundle & save Buy 2 and save checkout time

Premium patio lawn and garden quality selected for United States (USA) customers.

Routine pack Build your routine pack (3)

Fast dispatch with always-free shipping and secure checkout on every order.

Free shipping

i

Free shipping on every order. Fast dispatch, tracked delivery, and secure checkout included.

Easy returns

i

Simple return flow and responsive support for eligible items.

Peak-demand shipping delays

i

During high demand, deliveries may experience short carrier delays. Tracking updates remain active for every order.

24/7 customer support

Questions before checkout? Our team is available and ready to help.

Return & RefundEasy returns and policy details Shipping PolicyDelivery process and tracking info
Share

Why customers choose Cera Garden

Protect Your Pool with BioGuard Back Up 2-Qt, 2-Pack

BioGuard Back Up 2-Qt in a convenient two-pack brings a proven algae preventative to both chlorine and bromine pools. Its formula blends a potent algicide with a wetting agent, helping it reach tiny cracks and spaces where algae often begin.

Designed to work across pool surfaces without altering your pool chemistry, Back Up 2-Qt stays non-staining and pH-friendly. The 40% quaternary ammonium algicide targets algae growth, while the formulation is tuned to a mild pH around 5.7 in use. Warmer water typically heightens activity, so this guard can feel more active as temperatures rise.

What makes BioGuard Back Up 2-Qt a strong companion for pool care

  • Compatible with both chlorine and bromine systems, offering flexible protection.
  • Powerful surfactant/wetting agent enables penetration into tiny cracks and crevices.
  • High-clarity support—helps keep water looking clear by reducing visible algae.
  • Non-staining formula, safe for all pool surfaces.

Key benefits you may notice

  • Maintains a consistent water look as outdoor temps rise, when algae growth can accelerate.
  • Works as both preventative and ongoing control with weekly or interval dosing.
  • Stays compatible with standard pH and chlorine targets when used as directed.

How to use BioGuard Back Up 2-Qt (2-Pack)

Follow these steps to apply the product effectively while keeping your water balanced:

  • Initial treatment: add 32 fl oz per 25,000 gallons of water (about 4 ppm).
  • Weekly maintenance: add 1 fl oz per 5,000 gallons (about 0.5 ppm).
  • Bi-weekly interval: add 2 fl oz per 5,000 gallons (about 1 ppm) every other week.
  • Vacation protection: if leaving for a week or more, add 4 fl oz per 5,000 gallons per week unattended.
  • Edge dosing tip: pour around the shallow end edges if shock is used in the deep end.

Practical notes

For best results, adjust pH to 7.2–7.6 and maintain chlorine residual at 1–4 ppm before dosing. This product is designed to work with a wide range of pool surfaces without staining or pH disruption.

FAQ

Q: What makes BioGuard Back Up 2-1 Quart effective for pool algae prevention?

A: It combines a wetting agent with a 40% quaternary ammonium algicide to help prevent algae growth and keep water looking clearer.

Q: How should I dose BioGuard Back Up 2 for initial and weekly treatments?

A: Initial: 32 oz per 25,000 gal; weekly: 1 oz per 5,000 gal; every other week: 2 oz per 5,000 gal. Maintain pH 7.2–7.6 and 1–4 ppm chlorine.

You may also like