BioGuard Smart Shock 1 lb, Pack of 12, Algae Preventative, Swimming Pool Clarifier, Pool Shock Treatment, Multi-Purpose Shock for Pool Maintenance

Purchased other shock from pool store but it never took care of the algae. The Bio guard smart shock worked extremely well in getting rid of all the algae in the pool. Highly recommend.

Product and seller never disappoint.

Keeps pool water clear.

We used this brand of shock for 20 years. It’s the best.

Great product. Works as intended and very easy to use.

My Intellichlor chlorine generator went out and almost over night I lost all chlorine levels in my pool and had green wall algae starting. I replaced the Intelichlor devices, added 2 bags of this produce and ran the filter overnight. The next moring the chlorine level was perfect, algae was deminished and water was clear. It also did not have the strong chlorine smell you sometimes get with shock. Good product.

This shock works great for my pool.

I’ve been using the products from BioGuard since I’ve vote my pool 30 some years ago