Pool Brand Blackout Granular 90 Trichlor Pool Shock, 50 lbs. is the strongest chlorine pool shock in the industry at 90% available chlorine to kill algae fast.

Granular Trichlor Shock
99% Trichloro-S-Triazinetrione
90% Available Chlorine
Use as algae killer on white plaster pools
Strongest shock in the industry at 90%
Black algae treatment
Can be used as an alternative to Calcium Hypochlorite (Cal Hypo) pool shock

Product Type:	Pool Chemical
Chemical Type:	Shock
Chemical Size:	Granular
Active Ingredient:	Trichloro-S-Triazinetrione
Container Size:	Bucket: 50 lb

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3.7 7 Reviews

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7 Reviews

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E

Eric R.

01/14/25

Blackout Granular 90 Trichlor works but difficult to use

Tried this a few times and I am having trouble getting it to fully dissolve quickly. Can take a few days for all of it to dissolve.

A

Andy B.

08/15/24

Andy B

I have a 9'-0" deep pool end, and this is the only shock that I can use successfully, and without breaking the bank.

You pay for a lot up front but it ends up being $7 per pound, vs. $10 per pound for PPP.

The reviewer with the liner, needed to read the specifications prior to purchasing.
It is for plaster pools only.

M

Mark R.

08/03/24

Mark R

This stuff is horrible. Doesn't dissolve. Sits in the pool. Might bleach or damage the liner. I'm stuck with $380 of garbage since I opened it and used. I bought it over 30 days ago.

N

Noirist

07/26/24

Did Absolutely Nothing

I am stunned at how bad this stuff is. Some of it took over 24 hours to dissolve in our warm pool water. Even worse, it did nothing. The algae was unaffected by it, even when we tried using a large amount sprinkled throughout the pool.

K

Kilion

04/28/24

Most effective shock treatment available

Sure it’s more expensive than cal-hypo and other alternatives but it is by FAR the most effective chlorine available at 90% available chlorine. It also lowers your pH which really helps most of the time. I also use this stuff to treat my pool weekly. Just be careful with cyan since this will raise it. 3lbs is enough to totally blast a nasty pool. ...Read More

I use 1/2lb to 1lb weekly and never have trouble. You get what you paid for. Beats the heck out of everything else. Fun little tip though you can also get Tri-chlor tabs and just crush them if you want to save some money.. that can be messy and hazardous though. Read Less

Pool Brand - Blackout Granular 90 Trichlor Pool Shock, 50 lbs.

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Pool Brand - Blackout Granular 90 Trichlor Pool Shock, 50 lbs.

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